函数大全(c开头)

韩冰

函数大全(c开头)

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函数名: cabs 0 S, U. P9 U* w; ], S功 能: 计算复数的绝对值 用 法: double cabs(struct complex z); ' [3 ~2 ?* E7 }0 O程序例:

#include #include

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int main(void) { 7 r2 B0 E. r; q% c/ X1 {; estruct complex z; $ a0 @" \- g1 {" V0 h! Xdouble val;

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z.x = 2.0; ) O4 m1 \" B+ {8 [% V& u! W) K2 @" Ez.y = 1.0; ( ~) a6 O# G5 `% Y+ ~val = cabs(z);

printf("The absolute value of %.2lfi %.2lfj is %.2lf", z.x, z.y, val); return 0; } * }4 d) ?# [, q. @

函数名: calloc + G1 G9 m8 f7 p功 能: 分配主存储器 8 s7 {2 U* {9 `. l& P9 A' \+ ^用 法: void *calloc(size_t nelem, size_t elsize); 程序例:

#include #include

int main(void) { char *str = NULL;

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/* allocate memory for string */ str = calloc(10, sizeof(char));

/* copy "Hello" into string */ strcpy(str, "Hello");

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/* display string */ printf("String is %s\n", str);

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/* free memory */ 6 E- p: Q, `3 h) nfree(str);

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return 0; ; U' S0 ?5 O1 a; y} ) ]% J$ Q2 k' e & T1 ]+ {8 w7 ]' E& v8 G " `$ t6 I' a$ }% d: K1 \

函数名: ceil - w& Y) A# z' t# I. M, }功 能: 向上舍入 1 \4 ]# z' U$ s+ l; y用 法: double ceil(double x); 程序例:

#include #include

int main(void) { 2 Q- p3 b: p% u$ hdouble number = 123.54; double down, up;

down = floor(number); up = ceil(number);

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printf("original number %5.2lf\n", number); printf("number rounded down %5.2lf\n", down); % K. _" \8 ~4 {) C1 q8 ~printf("number rounded up %5.2lf\n", up);

return 0; } 1 M+ |4 @ I; Q 0 W6 |( @/ _% { 8 t, |! ~2 c5 i$ y+ w5 L

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函数名: cgets 功 能: 从控制台读字符串 用 法: char *cgets(char *str); 程序例:

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#include % Q" F s- v) A. w8 ~+ f( `#include

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int main(void) ) m" X) J' F& k9 ^{ char buffer[83]; 9 H& v! e' W$ @8 M. b& Q/ Ychar *p;

/* There's space for 80 characters plus the NULL terminator */ : z+ M$ J# V1 j, ^- K cbuffer[0] = 81;

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printf("Input some chars:"); p = cgets(buffer); printf("\ncgets read %d characters: \"%s\"\n", buffer[1], p); 9 n9 r8 D4 l4 y4 G/ Mprintf("The returned pointer is %p, buffer[0] is at %p\n", p, &buffer);

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/* Leave room for 5 characters plus the NULL terminator */ buffer[0] = 6;

printf("Input some chars:"); p = cgets(buffer); printf("\ncgets read %d characters: \"%s\"\n", buffer[1], p); printf("The returned pointer is %p, buffer[0] is at %p\n", p, &buffer); - J% z4 l& E9 t$ x7 g$ oreturn 0; } ) ~/ K- b, }# D- D- u

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函数名: chdir 3 o4 G1 Y. g7 ?1 G9 k8 w功 能: 改变工作目录 用 法: int chdir(const char *path); 程序例:

#include #include / ]' U7 W. j6 G7 f2 @#include

char old_dir[MAXDIR]; char new_dir[MAXDIR];

int main(void) { 7 j; U! |2 B0 {. g0 _/ f1 N4 zif (getcurdir(0, old_dir)) { perror("getcurdir()"); * Q" u* f: m* rexit(1); } / _5 u% m+ k# Cprintf("Current directory is: \\%s\n", old_dir);

if (chdir("\\")) { ; q; `' a3 y9 P0 z; uperror("chdir()"); 1 t9 h x; a+ L3 J8 Y" Eexit(1); }

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if (getcurdir(0, new_dir)) { perror("getcurdir()"); exit(1); 1 a2 ^' ]2 F, c% W4 K8 l} printf("Current directory is now: \\%s\n", new_dir);

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printf("\nChanging back to orignal directory: \\%s\n", old_dir); if (chdir(old_dir)) { perror("chdir()"); % ^ B4 c7 m# P6 b0 ]5 k1 ?exit(1); # H U1 J) X* F# j8 _# H0 X, q}

return 0; }

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函数名: _chmod, chmod 0 A* P5 k. Z. B) @$ O功 能: 改变文件的访问方式 & K: \* L6 d1 m) P' ]' d# Q( G0 \. n用 法: int chmod(const char *filename, int permiss); m+ p/ L! ~9 X" [2 n: l程序例:

#include # `$ X t: l9 N# @#include 3 K; S a6 _% h$ W3 B. Y( c#include

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void make_read_only(char *filename);

int main(void) % G. |3 G# g) t: B" v. V: w8 |{ , |0 n) E% V# Nmake_read_only("NOTEXIST.FIL"); make_read_only("MYFILE.FIL"); . u. b* i3 a/ i3 f! o$ C) ireturn 0; }

void make_read_only(char *filename) : x- Z: H2 w% K" L! g/ d' \6 k% Z{ - l3 C7 n/ M7 ^+ a4 U& B& Cint stat;

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stat = chmod(filename, S_IREAD); if (stat) printf("Couldn't make %s read-only\n", filename); else 3 c. M! G/ N! W5 ^+ z9 {printf("Made %s read-only\n", filename); } $ l/ n# G8 }( {# j 6 u7 a* D4 Q6 @. Z0 L+ t. u

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函数名: chsize ! B% |$ D# G* ^! i2 E功 能: 改变文件大小 ! S2 {" l+ g: [6 f$ T6 U, q用 法: int chsize(int handle, long size); 2 Y( S e8 q/ _, H程序例:

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#include 5 G# ^6 Y& v- p, I: {% n#include #include

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int main(void) { $ C0 Q, i8 ~$ k% t; L8 @int handle; char buf[11] = "0123456789";

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/* create text file containing 10 bytes */ / w! f+ R. c) V: uhandle = open("DUMMY.FIL", O_CREAT); ! N3 K, V6 Q( \% f& m0 N3 L zwrite(handle, buf, strlen(buf));

/* truncate the file to 5 bytes in size */ * d( f% d& p% l N: ]4 @chsize(handle, 5);

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/* close the file */ close(handle); . D5 j/ M* T# M- jreturn 0; } c- T4 m! H. A6 s: q

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函数名: circle * d& n; d4 K# F4 P) I6 g; u功 能: 在给定半径以(x, y)为圆心画圆 ' j- U" v4 E) P( w用 法: void far circle(int x, int y, int radius); 程序例:

#include #include #include #include

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int main(void) { & d3 H7 e( @! i0 p/* request auto detection */ , J2 {1 e- ^+ X, p0 Tint gdriver = DETECT, gmode, errorcode; - I6 v, }2 T5 w5 ~. m7 Mint midx, midy; / t4 U9 P$ a, ?2 f& m; ?int radius = 100;

/* initialize graphics and local variables */ }2 j+ T. I+ d7 linitgraph(&gdriver, &gmode, "");

/* read result of initialization */ errorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ 5 o5 G3 k8 `" C1 x% G, ]3 n{ 1 I- R0 R C9 ~. sprintf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); exit(1); /* terminate with an error code */ ) |1 z7 J2 \+ Y( R3 P}

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midx = getmaxx() / 2; {) h. P2 ]7 N; \; T$ Hmidy = getmaxy() / 2; setcolor(getmaxcolor());

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/* draw the circle */ / J. p8 Y! l! I; [2 xcircle(midx, midy, radius);

/* clean up */ getch(); closegraph(); 1 q$ i4 H# w" N" i* g& U6 F0 L; yreturn 0; 6 M% c' U8 B$ V: c0 H) V}

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函数名: cleardevice / H- o1 |3 D: g8 r% C0 B功 能: 清除图形屏幕 $ ]& ^1 M5 X, O) n# Q# d; D用 法: void far cleardevice(void); 程序例:

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#include #include ]8 Y* K; w8 ^" X0 J% ^) Z8 L( }#include 9 l* y& y. ^4 }, O4 i2 w* W# V#include

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int main(void) { ' Y$ E( p/ G' z. \5 c" x* J% T0 }/* request auto detection */ ( m4 k! M, g2 d# Uint gdriver = DETECT, gmode, errorcode; " N0 U: _8 K1 ?int midx, midy;

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/* initialize graphics and local variables */ initgraph(&gdriver, &gmode, "");

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/* read result of initialization */ + L3 D& h* F# {5 C8 L! Kerrorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ { 4 Z1 U6 O. ? _- S/ j5 ]2 ?6 ~) Hprintf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); ; O2 ], ? p$ t8 o# C# S7 i6 X# vexit(1); /* terminate with an error code */ }

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midx = getmaxx() / 2; . G2 t, s& } U2 B5 O. }midy = getmaxy() / 2; & `+ H! @$ G( K( Esetcolor(getmaxcolor());

/* for centering screen messages */ 0 X( c- a& r" u+ n9 Msettextjustify(CENTER_TEXT, CENTER_TEXT);

/* output a message to the screen */ 1 v- O; l; \' Q) wouttextxy(midx, midy, "press any key to clear the screen:");

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/* wait for a key */ . R) T( M; \2 \2 g4 q& \9 q* z; agetch();

/* clear the screen */ 7 C2 S7 o6 ]' |+ o+ m, u- ^cleardevice();

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/* output another message */ ; J& ~5 b% J7 kouttextxy(midx, midy, "press any key to quit:");

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/* clean up */ ' e; |/ w; {. Vgetch(); closegraph(); 5 }' U! S5 p6 J' T* I, @return 0; 7 Q" v# p+ S2 u7 ?" F+ y! t} 4 h4 p+ N4 z# }1 Z * |/ K1 G# W, y

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函数名: clearerr 功 能: 复位错误标志 $ h/ q2 [3 ^- m- m% O# w用 法:void clearerr(FILE *stream); 1 a9 t+ j+ u3 }程序例:

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#include

int main(void) { FILE *fp; char ch;

/* open a file for writing */ " n- y j5 k* S7 mfp = fopen("DUMMY.FIL", "w");

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/* force an error condition by attempting to read */ ch = fgetc(fp); printf("%c\n",ch);

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if (ferror(fp)) ( t% o( U3 Q; |% z4 z8 ^{ /* display an error message */ : q& s. O7 i0 D4 H) F w6 z& yprintf("Error reading from DUMMY.FIL\n");

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/* reset the error and EOF indicators */ clearerr(fp); # W9 F1 V4 g# x1 C! ^. w}

fclose(fp); return 0; # o7 J0 s: c& r) \* q3 |) Q} $ X+ [7 i% U6 \% V0 ]( s 1 t% M6 n q3 r! R 2 i/ {4 f$ a! K$ I( s. I

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函数名: clearviewport 1 B( j" S+ t6 X1 G& _7 Q, a功 能: 清除图形视区 {& ?& A$ d( T0 V7 J用 法: void far clearviewport(void); 程序例:

#include . ^3 m5 m0 j: Z: i' e( ^3 c" K#include ! ~5 o8 d1 Y; s0 j0 |#include - m( S/ y" I- ^ f1 T% O#include

#define CLIP_ON 1 /* activates clipping in viewport */

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int main(void) 5 }; T6 R1 H, c# Z" s) Q4 V{ ; _& ~& x) z1 f* y4 J/* request auto detection */ int gdriver = DETECT, gmode, errorcode; 2 ?! a8 S- u; d+ Yint ht;

/* initialize graphics and local variables */ initgraph(&gdriver, &gmode, "");

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/* read result of initialization */ ( \% X! i4 |5 f. b$ }# Rerrorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ 8 u! ?. F. r! o, a( i: A{ j+ ]* ~: r8 t7 Tprintf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); exit(1); /* terminate with an error code */ }

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setcolor(getmaxcolor()); 0 O7 {2 N7 t0 O4 [5 k3 `/ c4 G4 cht = textheight("W");

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/* message in default full-screen viewport */ / _, K; M9 I Y$ x9 \" m2 A. k+ Couttextxy(0, 0, "* <-- (0, 0) in default viewport");

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/* create a smaller viewport */ setviewport(50, 50, getmaxx()-50, getmaxy()-50, CLIP_ON);

/* display some messages */ $ S( l. X7 O$ T$ W" pouttextxy(0, 0, "* <-- (0, 0) in smaller viewport"); 8 S- H% u1 `' nouttextxy(0, 2*ht, "Press any key to clear viewport:");

/* wait for a key */ ; I: r8 d. D/ egetch();

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/* clear the viewport */ 8 v' x2 r$ M9 O2 @2 h* I% |clearviewport();

/* output another message */ 7 ]" d/ V; A: G0 Bouttextxy(0, 0, "Press any key to quit:");

/* clean up */ getch(); closegraph(); 5 R3 ] J% o1 u& V7 s8 y! Yreturn 0; + z/ R/ M" |; L* F1 m, e u} - i4 T/ t! S2 S+ k# G+ o1 ^. o 8 K0 a- s& l' b( e: T! C

函数名: _close, close 3 _- \3 u1 q7 R; _8 o6 A0 O1 a功 能: 关闭文件句柄 2 D/ g9 @9 ^' @+ Q% R9 ~: I用 法: int close(int handle); 程序例:

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#include , I' x/ {( n W. W3 u1 `#include " \* t0 V m, m: y+ t* K3 R#include #include

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main() ) J* g$ L# h s8 T/ G1 |6 v{ int handle; $ T7 d. u, t) P' Q: A1 a9 ychar buf[11] = "0123456789";

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/* create a file containing 10 bytes */ 8 l- |6 _4 ~( \" {6 ahandle = open("NEW.FIL", O_CREAT); ) K& U4 w2 o1 {) K1 o n5 Bif (handle > -1) { write(handle, buf, strlen(buf));

/* close the file */ + k" _: [0 K) H2 U) }8 |7 @close(handle); } else { printf("Error opening file\n"); . P- V! ?0 s1 s5 y9 S} return 0; } ) L( B! _& i: ?7 }) I4 C. ^5 Z( m ) }# c6 Z7 F) i2 ?8 s% S+ u* ?

函数名: clock 9 k6 _" T" r" s( z* Z0 J功 能: 确定处理器时间 用 法: clock_t clock(void); 程序例:

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#include ( { i6 ^0 ]6 l: g" O2 w#include #include

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int main(void) ( l2 d7 `9 k' A0 i' \$ W: h{ % {% Y: h" r. R+ Aclock_t start, end; start = clock();

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delay(2000);

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end = clock(); printf("The time was: %f\n", (end - start) / CLK_TCK);

return 0; ! N$ t" ~( L0 ~( P' O" h& b) D} 9 L9 m6 }% A$ | * K: z. h- H8 O- o

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函数名: closegraph 3 w5 ?" Z. K* S& f, a V- Q; G功 能: 关闭图形系统 用 法: void far closegraph(void); 程序例:

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#include 0 j0 M! C6 r; c' c2 Q9 b: P4 n2 V8 |/ d#include #include #include

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int main(void) { /* request auto detection */ : z9 C' h% X3 r# M% ?- Z! l& ^int gdriver = DETECT, gmode, errorcode; int x, y;

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/* initialize graphics mode */ initgraph(&gdriver, &gmode, "");

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/* read result of initialization */ errorcode = graphresult();

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if (errorcode != grOk) /* an error occurred */ " x: q- x/ Z3 ?{ printf("Graphics error: %s\n", grapherrormsg(errorcode)); : o* F+ v* `) _* K; Y R( M9 Eprintf("Press any key to halt:"); getch(); , H1 _. a: S9 ?2 r+ s* x, v& E: {exit(1); /* terminate with an error code */ }

x = getmaxx() / 2; y = getmaxy() / 2;

/* output a message */ 2 Z) u- p4 K8 u2 ^& H4 @# }settextjustify(CENTER_TEXT, CENTER_TEXT); . a! e/ z- W: e6 ~( {) Bouttextxy(x, y, "Press a key to close the graphics system:");

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/* wait for a key */ 0 h0 I; C( T4 \6 ~' Ygetch();

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/* closes down the graphics system */ closegraph();

printf("We're now back in text mode.\n"); printf("Press any key to halt:"); getch(); return 0; } ; p- L" l/ f( R+ r6 \+ O

函数名: clreol ; @8 i! q- ~. }功 能: 在文本窗口中清除字符到行末 用 法: void clreol(void); 8 ]$ P/ x. P E; I/ e4 _1 A程序例:

#include

int main(void)

{ clrscr(); cprintf("The function CLREOL clears all characters from the\r\n"); cprintf("cursor position to the end of the line within the\r\n"); / B; S7 A/ D& h: z: ncprintf("current text window, without moving the cursor.\r\n"); $ |( D0 D& j1 t3 \9 q, W- \; H: ~/ Rcprintf("Press any key to continue . . ."); gotoxy(14, 4); getch();

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clreol(); getch();

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return 0; } 8 X @$ l: t6 K" K6 h( Q& ^9 P ( b( v" R. `$ c/ y2 e$ A: W

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函数名: clrscr 功 能: 清除文本模式窗口 用 法: void clrscr(void); 程序例:

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#include

int main(void) { int i;

clrscr(); - x( a- z1 x% G, x, n/ jfor (i = 0; i < 20; i++) cprintf("%d\r\n", i); & E3 M( m/ k2 e9 r9 U8 H1 L Rcprintf("\r\nPress any key to clear screen"); # ^* f t6 \$ u; Ggetch();

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clrscr(); 8 d0 h/ ?5 ?* T4 @cprintf("The screen has been cleared!"); getch();

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return 0; 0 ]5 l5 }: K) T$ E, U! C/ x# o} ; U* E( l9 |% ^4 M7 N4 W* } 2 b( `# S0 z; P7 t- H. C * ?" ?: f- H! H7 [; c1 ?$ e% i

函数名: coreleft 功 能: 返回未使用内存的大小 用 法: unsigned coreleft(void); ) Y3 W* ]. ]% S! p9 d: k) h6 @: M$ a程序例:

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#include #include

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int main(void) % S; G; |8 l* `! e" \! i{ printf("The difference between the highest allocated block and\n"); - f( [* w" ^/ n7 n9 bprintf("the top of the heap is: %lu bytes\n", (unsigned long) coreleft());

return 0; / p1 T7 W2 _/ C! N: q: X1 c, H} & R/ }) E: ]3 w2 C

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函数名: cos 功 能: 余弦函数 . p) G* t5 j1 E+ M' G* Q2 R6 j% z用 法: double cos(double x); ; T5 W) g: D% j F7 Y5 }程序例:

#include #include

int main(void) 8 j( x$ U* A2 P% `- I9 W6 M{ 8 L" m$ a% Q a) Z1 c6 u" i" fdouble result; 9 ~4 |7 A; [/ V5 kdouble x = 0.5;

result = cos(x); $ n+ l: f% m$ b7 A4 r4 {printf("The cosine of %lf is %lf\n", x, result); return 0; 2 H9 \% G5 q( C) n3 _} 9 D( K/ r( C+ [, R , n& o# x1 O0 i2 G& E/ {( j

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函数名: cosh 功 能: 双曲余弦函数 用 法: dluble cosh(double x); : n* B$ G! D% s, R/ Q0 F3 x程序例:

#include #include

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int main(void) { / `9 h4 N( V6 c' ]: P. l/ r: Vdouble result; f v6 k! ~/ l, s! Y# a7 p, f* u7 J5 ldouble x = 0.5;

result = cosh(x); 2 _# F: \ D2 E8 u5 cprintf("The hyperboic cosine of %lf is %lf\n", x, result); , Y' v; b7 B2 X1 Ereturn 0; } + O7 w& U$ ?2 m

函数名: country - P& j- Q6 b2 U8 ]功 能: 返回与国家有关的信息 用 法: struct COUNTRY *country(int countrycode, struct country *country); # R4 M3 V& H e% P& S( d' m程序例:

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#include # N/ p5 S, {, T. y4 j#include

#define USA 0

int main(void) 9 c k+ {& S) x5 d/ j* }{ 8 _) b( F$ {8 p: istruct COUNTRY country_info;

country(USA, &country_info); printf("The currency symbol for the USA is: %s\n", : V2 A# Z1 A: b( p" r' |country_info.co_curr); 0 k5 `9 [0 t. J0 Vreturn 0; 6 v+ P& T& m- {; w$ i& c} # g2 F: L# W$ x# b/ c6 O - c, E- n) C4 S/ A+ r# Q# y / h3 i6 p' R& Z) F: Y

函数名: cprintf 功 能: 送格式化输出至屏幕 用 法: int cprintf(const char *format[, argument, ...]); 程序例:

#include

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int main(void) { 5 c# p/ U! z; j) a" x- G6 P& \! B/* clear the screen */ 6 S% b+ w' ] bclrscr();

/* create a text window */ " {4 j, h0 ?7 c: Uwindow(10, 10, 80, 25);

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/* output some text in the window */ ; ?* O, K/ y8 P; C- n$ I' g5 F% _6 [cprintf("Hello world\r\n");

/* wait for a key */ 8 s, M8 B1 M/ m' ygetch(); ! D4 c4 S5 F" W9 c% }9 u- creturn 0; + d3 F5 }+ H* B' q1 F9 }4 t; z} 8 z' o- }$ v2 ~: i ) ~' v: P* d( l$ ~

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函数名: cputs 功 能: 写字符到屏幕 ) Y7 _$ n9 C& G$ A- A! V用 法: void cputs(const char *string); 0 O9 U, k$ @( i+ `% m/ C& y; L/ x程序例:

#include

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int main(void) * O8 d2 d9 O6 x) h& S{ /* clear the screen */ $ M3 r- v; l( U Q) Fclrscr();

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/* create a text window */ 6 O1 F% }9 [" C/ b/ ^ u! ^window(10, 10, 80, 25);

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/* output some text in the window */ * {" Z8 { S' K: f$ zcputs("This is within the window\r\n");

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/* wait for a key */ getch(); return 0; / J& `" Y+ }, w. W2 ~} / X- B) S* f6 s r; ^4 ? / G# d( g. I1 a* b* x# W 9 Q; |6 U, Q# F B1 c

函数名: _creat creat 功 能: 创建一个新文件或重写一个已存在的文件 + S' ~9 e! d, p: }2 x1 P6 l用 法: int creat (const char *filename, int permiss); r: g% \- ?1 S2 w! K程序例:

#include #include #include #include

int main(void) { 4 ~8 B- m) a7 e) z/ V% yint handle; % ^4 D/ l, |# z3 C* ochar buf[11] = "0123456789";

/* change the default file mode from text to binary */ _fmode = O_BINARY;

/* create a binary file for reading and writing */ handle = creat("DUMMY.FIL", S_IREAD | S_IWRITE);

/* write 10 bytes to the file */ write(handle, buf, strlen(buf));

/* close the file */ ! |4 U7 ]8 j5 N3 Z( ]" n4 {! bclose(handle); return 0; # N. {! \: X7 g, M8 x- p}

函数名: creatnew 功 能: 创建一个新文件 用 法: int creatnew(const char *filename, int attrib); 程序例:

#include & d. l6 t: V9 B- D2 R5 l#include #include 8 \* d5 V( r. F: m. t6 m$ i6 T. a#include 3 Y' }& k9 U: g#include

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int main(void) { ) a6 c. ?; x8 L6 nint handle; char buf[11] = "0123456789";

/* attempt to create a file that doesn't already exist */ handle = creatnew("DUMMY.FIL", 0);

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if (handle == -1) 3 n2 F: s7 ]8 _6 K' x& `$ J# bprintf("DUMMY.FIL already exists.\n"); / i! n+ `3 D6 P* } L: q) N" ?8 ?else { + ^, q5 m5 L0 {( H& [printf("DUMMY.FIL successfully created.\n"); ' J G+ C1 P! hwrite(handle, buf, strlen(buf)); P a* X9 I+ n; @8 Tclose(handle); } . K: M- D" P, Y9 d3 A' \" freturn 0; - y; f3 d% f0 o' {3 G" T} 8 P6 u; t& y! H0 E- H b7 f) Z6 D* ?

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函数名: creattemp 7 @0 B5 n t. H功 能: 创建一个新文件或重写一个已存在的文件 用 法: int creattemp(const char *filename, int attrib); 程序例:

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#include #include #include

int main(void) ! L- E3 b( |6 h# M# M" Q( T{ u) s" m( R4 Eint handle; 5 L& L3 P0 s* b3 o5 f3 D- `char pathname[128];

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strcpy(pathname, "\\");

/* create a unique file in the root directory */ 6 n& B+ z& h3 `# Q8 |2 i/ Qhandle = creattemp(pathname, 0);

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printf("%s was the unique file created.\n", pathname); 8 l) j0 K6 _ Y1 Pclose(handle); $ `, H( o% j7 I. Y3 m( w) Creturn 0; 7 I4 K2 ^! } X, f5 d5 |0 e} & ]: N9 v" t3 T6 s

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函数名: cscanf 6 x G0 l; ?9 c功 能: 从控制台执行格式化输入 % v+ }6 y4 C# Z+ K7 f用 法: int cscanf(char *format[,argument, ...]); 程序例:

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#include

int main(void) { char string[80];

/* clear the screen */ % a3 J+ Z3 e+ h+ S4 @1 k/ Vclrscr();

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/* Prompt the user for input */ cprintf("Enter a string with no spaces:");

/* read the input */ cscanf("%s", string);

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/* display what was read */ cprintf("\r\nThe string entered is: %s", string); 9 N, E% U+ J! O, b. W! freturn 0; } ( o' Q: a1 h3 f8 k! P; j

函数名: ctime # R5 B5 F& I" R功 能: 把日期和时间转换为字符串 用 法: char *ctime(const time_t *time); 程序例:

#include 9 o; T: H9 u8 w, x+ M$ I/ ?#include

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int main(void) 9 ]$ q) J& _) J7 T7 X8 W{ 8 C% F( o) c& I4 e" Ktime_t t;

time(&t); printf("Today's date and time: %s\n", ctime(&t)); 2 c& {; ?6 H( ]( jreturn 0; } 3 W/ ^% n# z9 m- }! r + e- ?2 K; E$ O

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函数名: ctrlbrk 功 能: 设置Ctrl-Break处理程序 6 H- ?6 i% j6 z) B用 法: void ctrlbrk(*fptr)(void); " I0 n5 m- x: @5 p( g/ L6 s程序例:

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#include #include

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#define ABORT 0

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int c_break(void) e5 c$ M/ r# u0 x5 d{ printf("Control-Break pressed. Program aborting ...\n"); 9 ]" {/ U7 f% Oreturn (ABORT); 8 b8 f0 ^5 s& S4 D}

int main(void) { / U P( m6 u+ M/ k$ v* }# Ictrlbrk(c_break); & h; E/ ?: D, W# X5 Tfor(;;) { printf("Looping... Press to quit:\n"); } 4 y. l6 m; v2 Nreturn 0; }

hjl19890710hjl

特别感谢

gssdzc

还是感谢分享。。。

xxb1922

这样看太痛苦了，还不如去下载一个专门查函数的软件，我就有一个

xxb1922

这样看太痛苦了，还不如去下载一个专门查函数的软件，我就有一个

chenlk

有价值！

zjf

[em49]

谢谢啊