函数大全(c开头)

韩冰

函数大全(c开头)

函数名: cabs * ?( |5 N" N" W! V O$ }功 能: 计算复数的绝对值 用 法: double cabs(struct complex z); $ U6 F B, Z! R6 X程序例:

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#include #include

int main(void) % S1 y4 i2 A! r{ / k' d9 F; n3 {% t: qstruct complex z; double val;

z.x = 2.0; z.y = 1.0; ! C B: a! E- n, }; M. C6 `! ?val = cabs(z);

printf("The absolute value of %.2lfi %.2lfj is %.2lf", z.x, z.y, val); return 0; 0 Q* a8 {0 t8 k7 g} P" D. i5 g/ l 1 G+ c& P8 y. o+ ^

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函数名: calloc $ z- ?$ ~5 G# `3 B$ S' ?# v) B功 能: 分配主存储器 用 法: void *calloc(size_t nelem, size_t elsize); - G5 V% q7 V: x6 L程序例:

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#include 7 l$ _6 @ Q! u. B y6 Q% f% g7 u#include

int main(void) : K1 w8 g9 p4 ~( i: I0 i. a{ char *str = NULL;

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/* allocate memory for string */ 9 D- a J1 L, c4 X$ }str = calloc(10, sizeof(char));

/* copy "Hello" into string */ 3 @2 Z& X ?- L* V( g7 E9 fstrcpy(str, "Hello");

/* display string */ 7 u L9 g! z& A3 s- t% aprintf("String is %s\n", str);

/* free memory */ % m, p) I2 [5 q. Y( Ifree(str);

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return 0; 1 K5 E, T6 Z5 e! v1 J} ' h) T8 U1 X5 a7 U! E' Q

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函数名: ceil 功 能: 向上舍入 用 法: double ceil(double x); h7 [$ ?! ^+ y. m: u程序例:

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#include 8 X, m- X( b+ J9 g#include

int main(void) ; ~ ^- s: g; U4 `% Z. S1 M{ double number = 123.54; ( t% y, V$ I, i7 a& N( ]" ]0 t# ydouble down, up;

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down = floor(number); # S8 R: n: W; O% k+ c! `6 _4 Y2 Q( v+ bup = ceil(number);

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printf("original number %5.2lf\n", number); + C4 N a% i/ {1 |9 hprintf("number rounded down %5.2lf\n", down); 6 U/ {5 v# P( h/ `printf("number rounded up %5.2lf\n", up);

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return 0; } # c3 K* d' ]- m1 T: r6 k1 z6 P

函数名: cgets 3 s+ c5 ^' d; c* \& A功 能: 从控制台读字符串 # c/ c/ a y' A* Q: Y% b& Y用 法: char *cgets(char *str); : K( }$ E7 Z& u: k& [7 ~1 |程序例:

#include #include

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int main(void) 5 f, m1 k0 h' B! ^' I0 e{ char buffer[83]; char *p;

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/* There's space for 80 characters plus the NULL terminator */ + C7 g- c' q" S" hbuffer[0] = 81;

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printf("Input some chars:"); p = cgets(buffer); 6 ?/ v9 t6 Z* K/ q! J( aprintf("\ncgets read %d characters: \"%s\"\n", buffer[1], p); printf("The returned pointer is %p, buffer[0] is at %p\n", p, &buffer);

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

printf("Input some chars:"); - ]9 p/ y* O% i* V) j" Lp = 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); 6 f" q( o. H0 vreturn 0; ! e, X: l% s' u- f6 Z3 }: i: ?5 d: B} / n( q/ h% [5 O9 y$ v \. c - u. }& W5 `$ `9 ^, ~ 9 D1 W- S# H0 z* U' k

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函数名: chdir 功 能: 改变工作目录 8 e Y+ D: Y8 u2 u用 法: int chdir(const char *path); ( o2 g2 L$ @. J& b/ n程序例:

#include / K: W( T9 Z0 x9 I+ U) O$ Q#include #include

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

int main(void) : U) P" I4 j, ^{ if (getcurdir(0, old_dir)) " B* @* ~; o \- a{ 5 C9 H6 ~0 c& r- f& Y5 _% Pperror("getcurdir()"); exit(1); } printf("Current directory is: \\%s\n", old_dir);

if (chdir("\\")) { 7 B8 o+ f, p, b* V8 Qperror("chdir()"); 8 T% O+ s% h5 ^; g2 rexit(1); 1 B9 `: F( u( Z2 R, ?}

if (getcurdir(0, new_dir)) { 8 [9 m0 n T! y" j9 i) r6 pperror("getcurdir()"); 5 s) f' H* \$ A7 H4 Jexit(1); } 5 G* Y# ]# G5 G0 f5 S! l, [% iprintf("Current directory is now: \\%s\n", new_dir);

printf("\nChanging back to orignal directory: \\%s\n", old_dir); ; n) U: @! g, hif (chdir(old_dir)) { perror("chdir()"); ' X* r: N' W+ p' V% Pexit(1); 7 D0 S0 d" c1 B: \7 S' P4 o' v}

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return 0; * ]$ I. i, ?" d% U& a& `} / U* r, n/ V& S3 Z! X, h, L6 D" z b

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函数名: _chmod, chmod 5 o* ^' ~% ~! J. \功 能: 改变文件的访问方式 用 法: int chmod(const char *filename, int permiss); 程序例:

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#include #include #include

void make_read_only(char *filename);

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int main(void) ' v% C* `" G9 T7 i{ & A' T# |4 z4 ~# jmake_read_only("NOTEXIST.FIL"); * P! z" \& e5 K$ nmake_read_only("MYFILE.FIL"); return 0; }

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void make_read_only(char *filename) 8 v$ z# x( _9 I0 ?9 H{ # w! b V: ^! G; K1 U' y; S$ eint stat;

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stat = chmod(filename, S_IREAD); if (stat) 0 }2 {: X2 i9 T* l2 c# xprintf("Couldn't make %s read-only\n", filename); N' s8 o3 r. M r; Telse / l Z1 d% G. y& b+ m( j4 r+ Iprintf("Made %s read-only\n", filename); } ; m$ a# c) R+ b6 `/ _9 V* W, J+ M9 ` ! Z( `/ O1 T! a

函数名: chsize " x' n1 K6 m# o' c功 能: 改变文件大小 0 v1 z; f4 i" z& `; u用 法: int chsize(int handle, long size); : x. ?: N% B- Y( U- M; O! r程序例:

#include $ s/ S& \ u+ g3 d7 N5 ?3 { v#include 8 q; i! R. ^ M. a#include

int main(void) : }5 j9 ^7 z& `- D p+ k7 R0 ?4 T{ int handle; 1 e7 f% e% G: Z! C6 E! Echar buf[11] = "0123456789";

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/* create text file containing 10 bytes */ handle = open("DUMMY.FIL", O_CREAT); write(handle, buf, strlen(buf));

/* truncate the file to 5 bytes in size */ chsize(handle, 5);

/* close the file */ 6 {4 Q: K, M: a Y( D6 q5 yclose(handle); $ W1 W' w% Q" ?; r* S. I3 treturn 0; - [; @6 `) Z$ h5 u4 B}

函数名: circle & z3 F$ }" i p. B1 [/ ]功 能: 在给定半径以(x, y)为圆心画圆 用 法: void far circle(int x, int y, int radius); 2 i! }0 h0 a, a- `: N: T程序例:

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#include #include 8 o8 G6 Q4 N' W2 J4 H) P) Y5 K. T#include #include

int main(void) { ) g$ d% U5 T5 W; F8 k/* request auto detection */ 8 L% k7 ~8 L2 |! j7 Z" K4 |. R' H$ Cint gdriver = DETECT, gmode, errorcode; int midx, midy; & ]( F: o3 ~2 _2 Fint radius = 100;

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

/* read result of initialization */ 9 ^+ P0 u4 b: c6 h, Uerrorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ # w: R0 I: D& I2 Y% ^! R{ printf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); 5 B* F/ u; Z! J3 r: V) jexit(1); /* terminate with an error code */ + r/ Z" ` K7 l$ E; M}

midx = getmaxx() / 2; 4 Y- P L" S0 cmidy = getmaxy() / 2; 6 l6 n- Q2 u9 @& p6 ^5 u/ ]setcolor(getmaxcolor());

/* draw the circle */ circle(midx, midy, radius);

/* clean up */ 6 O* Y6 ?% o* C+ agetch(); closegraph(); / x ^2 H4 W7 w$ Wreturn 0; ; d* k1 p8 W* Z/ o% M} % e. P1 G; H$ r6 F% A # p& d. B) d2 ?; [1 Q, ]' [

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函数名: cleardevice 功 能: 清除图形屏幕 用 法: void far cleardevice(void); ; U+ _8 O, H: T. q. `; g程序例:

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#include 6 V! m: a1 r8 |#include #include #include

int main(void) 8 G0 a! }+ _7 N: \# J% ^{ 3 z, M; [* W: x) ?/* request auto detection */ 2 m& I$ |9 r) H# Z1 j) U6 g& M" tint gdriver = DETECT, gmode, errorcode; int midx, midy;

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

/* read result of initialization */ errorcode = graphresult(); % d% b* w# U4 B3 m3 }if (errorcode != grOk) /* an error occurred */ { printf("Graphics error: %s\n", grapherrormsg(errorcode)); ; W, w, M/ O" W5 l& pprintf("Press any key to halt:"); getch(); , Z5 x& ~& y7 O `1 Uexit(1); /* terminate with an error code */ }

midx = getmaxx() / 2; midy = getmaxy() / 2; 0 V8 [% v6 {. n9 c asetcolor(getmaxcolor());

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/* for centering screen messages */ ! p$ H' a$ [6 P. t& Wsettextjustify(CENTER_TEXT, CENTER_TEXT);

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/* output a message to the screen */ outtextxy(midx, midy, "press any key to clear the screen:");

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/* wait for a key */ , ?# f' r" X% p; _+ {getch();

/* clear the screen */ cleardevice();

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/* output another message */ outtextxy(midx, midy, "press any key to quit:");

/* clean up */ getch(); closegraph(); return 0; } / N5 |: T+ j% A5 z8 P 5 H. |" k6 i9 F7 y' M

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函数名: clearerr : a* p4 `+ K @- d% \ l功 能: 复位错误标志 2 t: e" z+ ] k1 C+ H! {/ Y1 ^. H7 y; u5 ]用 法:void clearerr(FILE *stream); 程序例:

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#include

int main(void) ! l7 F' V/ i! S) _8 q1 c) R4 E4 d3 l{ FILE *fp; : T2 i% F' m4 F9 a3 ]* x! mchar ch;

/* open a file for writing */ fp = fopen("DUMMY.FIL", "w");

/* force an error condition by attempting to read */ + _: c' G) z5 [" m0 x, @; g2 K- `ch = fgetc(fp); printf("%c\n",ch);

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if (ferror(fp)) { ' f. |, I \1 ~( i; ^/* display an error message */ printf("Error reading from DUMMY.FIL\n");

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/* reset the error and EOF indicators */ " @- }3 G: }( l7 I7 ^: Lclearerr(fp); ; c' c; Y# N$ C5 E& ^, w}

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fclose(fp); , k) E7 v% W' R/ o9 L# h- Preturn 0; - P. a1 u( I: e; p% j3 ?9 R" V/ H} 1 e& e% O/ M; r1 G ( Q$ ~- v5 }* A9 p2 r- G/ ~

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函数名: clearviewport & b- i) A% T3 r功 能: 清除图形视区 用 法: void far clearviewport(void); 程序例:

#include #include #include ! c( e9 ?1 _3 W#include

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

int main(void) 4 l6 ^& c) e+ E2 \. H$ b4 \4 ?{ 8 I* S* _% A( @" Q8 [/* request auto detection */ # p- y( d4 c! B, m" }5 W) dint gdriver = DETECT, gmode, errorcode; int ht;

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

/* read result of initialization */ : X' j! ?1 O! P; z( |# D) G% Ierrorcode = graphresult(); 5 Z' c6 \( F6 B9 i" U- Iif (errorcode != grOk) /* an error occurred */ # v6 e: y" o, Z' S0 T" Y9 l3 n1 u{ printf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); , z5 \) r0 d, Tgetch(); 9 q1 W) c( q' h' texit(1); /* terminate with an error code */ }

setcolor(getmaxcolor()); ht = textheight("W");

/* message in default full-screen viewport */ ( @ a' ]; P+ C1 qouttextxy(0, 0, "* <-- (0, 0) in default viewport");

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

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/* display some messages */ outtextxy(0, 0, "* <-- (0, 0) in smaller viewport"); * `9 G4 { t# I: M0 jouttextxy(0, 2*ht, "Press any key to clear viewport:");

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/* wait for a key */ # O$ L& e, h- {4 k& C: Y8 g0 l8 Agetch();

/* clear the viewport */ clearviewport();

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/* output another message */ ) a# y, }/ k" f( D5 bouttextxy(0, 0, "Press any key to quit:");

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/* clean up */ getch(); closegraph(); ! `( N, u; \# [% y& xreturn 0; } ' P+ ]+ \# B+ a$ ?2 e

函数名: _close, close 功 能: 关闭文件句柄 4 t( f) T- x M9 v7 j5 A用 法: int close(int handle); p; s) M$ N s+ F( h( Q$ R程序例:

#include & G; r4 b8 q9 A! A" S" l" }#include #include #include

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main() * u( Z7 u, I: P0 Q+ m{ 0 D2 b9 ^, k& `; Kint handle; 4 ]$ u+ ?1 J' xchar buf[11] = "0123456789";

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/* create a file containing 10 bytes */ 8 U* \# S/ |# K) @0 H4 ?9 X/ lhandle = open("NEW.FIL", O_CREAT); 6 N. v$ x) X1 x! R- b) Mif (handle > -1) 6 w* e! \1 G0 r; s+ x{ write(handle, buf, strlen(buf));

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/* close the file */ close(handle); } else " ~5 i5 M, K4 n- ~8 V+ k{ 4 _6 l6 O+ ^& a2 l3 m2 ?% Kprintf("Error opening file\n"); } return 0; }

函数名: clock 功 能: 确定处理器时间 , X3 ~9 [: H& Q' P0 [& w用 法: clock_t clock(void); 程序例:

#include #include 4 ]- i, E* W* d4 G#include

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int main(void) 3 R9 p2 X$ ?4 m+ T) v{ # T* G) V3 r+ Q7 e- \7 I0 `4 Aclock_t start, end; % B$ J8 F7 n( ]start = clock();

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delay(2000);

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

return 0; } - E: d7 Q& Q/ T1 p9 j' Y; ^ H( H$ j' s$ e+ {* ~% T

函数名: closegraph 1 L2 t' j0 Z' G( L功 能: 关闭图形系统 用 法: void far closegraph(void); ! M ]$ L$ m" \' I程序例:

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#include / i: S0 ?' v+ P/ Z( h- Y#include ( @2 t9 P/ W) T; Q N5 ~#include #include

int main(void) 5 X: @* R' u0 y: a{ ; _0 m8 g* C1 n& [5 |9 S, v/* request auto detection */ int gdriver = DETECT, gmode, errorcode; int x, y;

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/* initialize graphics mode */ 7 Z3 @& g1 r& L/ |. e# Qinitgraph(&gdriver, &gmode, "");

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

if (errorcode != grOk) /* an error occurred */ 2 W' K8 y( ]' c9 g# E: f$ K6 D{ 6 y( a+ s8 r) ]5 o5 M& `printf("Graphics error: %s\n", grapherrormsg(errorcode)); 4 A8 M: s/ }! h( jprintf("Press any key to halt:"); 0 X4 Z. ]* b# L! k# rgetch(); exit(1); /* terminate with an error code */ 5 ?# X) W4 k- U" Q}

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

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/* output a message */ 4 W, J" F8 t( zsettextjustify(CENTER_TEXT, CENTER_TEXT); outtextxy(x, y, "Press a key to close the graphics system:");

/* wait for a key */ / @( G. c# r2 M! L2 e5 d& [ K! ngetch();

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

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printf("We're now back in text mode.\n"); * O4 q: ~1 V- Vprintf("Press any key to halt:"); o( [- l& [! k( [; U+ K/ `7 Wgetch(); $ ~4 ~6 X' c4 kreturn 0; } & h( W- I a! F8 {+ [7 t - g3 W( }- p' |* m: i. z

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函数名: clreol - t6 n( ?2 c, k功 能: 在文本窗口中清除字符到行末 8 P& q+ G X& i用 法: void clreol(void); 程序例:

#include

int main(void)

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{ 2 Q4 N1 m/ P: X! y6 u+ Hclrscr(); 8 w" ^( H; e1 N0 _cprintf("The function CLREOL clears all characters from the\r\n"); 5 B" t: p/ g* I1 j6 A$ qcprintf("cursor position to the end of the line within the\r\n"); ]6 G: Q: h! I' X& {cprintf("current text window, without moving the cursor.\r\n"); cprintf("Press any key to continue . . ."); gotoxy(14, 4); ; h/ D) ?) h2 g4 c4 lgetch();

clreol(); , B( H6 y# l: P' N5 Q- Wgetch();

return 0; } / J8 ?4 D8 K! r O& s

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函数名: clrscr 7 m! Q. D4 l0 q0 v功 能: 清除文本模式窗口 用 法: void clrscr(void); T% Q% Q* h* G程序例:

#include

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int main(void) 3 L8 w$ n* i' {$ r2 I% v" m- b{ ( q4 W9 j% @& ^4 J9 ?' f4 T( Iint i;

clrscr(); for (i = 0; i < 20; i++) 5 C" z: n7 W3 Xcprintf("%d\r\n", i); cprintf("\r\nPress any key to clear screen"); getch();

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clrscr(); 2 n; i' ]3 _5 T; K4 Ncprintf("The screen has been cleared!"); 4 R' g4 r! O. e' H7 v, F- k/ Igetch();

return 0; 2 V/ u8 R0 m% y; d# G% S# ?5 n& g6 J} ( @% o9 Q# L+ H" A; R

函数名: coreleft - v& E' y) `& y+ O4 D1 b" X# ]功 能: 返回未使用内存的大小 ( N! |: Y. w0 t8 q用 法: unsigned coreleft(void); ( U! @/ W. ]; z" r程序例:

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#include ! k; O/ w0 l; `" T0 [1 R#include

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int main(void) { printf("The difference between the highest allocated block and\n"); 8 j" Q' |1 c+ b8 z& t# K. `printf("the top of the heap is: %lu bytes\n", (unsigned long) coreleft());

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return 0; 3 N: q( \+ _& E- e. B. H) u \2 ~}

函数名: cos 功 能: 余弦函数 6 ?' n+ G( \5 ?9 B5 q用 法: double cos(double x); * l( T4 ~4 }0 x7 n程序例:

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#include 2 S- \/ G8 x4 E: T2 }! n#include

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int main(void) { double result; double x = 0.5;

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result = cos(x); printf("The cosine of %lf is %lf\n", x, result); return 0; } - k' A9 F3 U( m2 {2 y9 Z, B2 Y

函数名: cosh 9 }. k7 V7 ?: a; w功 能: 双曲余弦函数 ! s) ~$ o! u8 X2 X) X { [! X* q用 法: dluble cosh(double x); N/ y6 p* \* ?" v程序例:

#include #include

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int main(void) 2 v8 z& [; a) x{ $ x! P2 H' H" j7 c$ ~double result; 4 K R+ r# _& Qdouble x = 0.5;

result = cosh(x); 7 r2 c% P( p- b& ^: A; c' q# Kprintf("The hyperboic cosine of %lf is %lf\n", x, result); $ Z8 i: L9 G# f; m, v. hreturn 0; }

函数名: country 功 能: 返回与国家有关的信息 用 法: struct COUNTRY *country(int countrycode, struct country *country); 程序例:

#include - \1 k6 X$ `6 n$ K#include

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#define USA 0

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int main(void) ( B, ?" T" F% x/ k{ struct COUNTRY country_info;

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country(USA, &country_info); 9 o& @1 T! F$ Vprintf("The currency symbol for the USA is: %s\n", ( r! c2 Y. u F9 ?. y* _" L, |8 y8 dcountry_info.co_curr); return 0; } . o5 K o- c+ j $ T, Y2 g- k8 ~$ \ ) V8 h3 g) N0 k9 g% t

函数名: cprintf " ^1 j% J" v3 I6 ~功 能: 送格式化输出至屏幕 用 法: int cprintf(const char *format[, argument, ...]); " g- g4 |0 ~. B$ M( P7 |6 T# |程序例:

#include

int main(void) 5 z2 x0 o, j2 p" l. m7 R1 Y% k{ $ o! ^/ ~* |! _/* clear the screen */ & A. W' K: ?7 k& p1 H2 O) Dclrscr();

/* create a text window */ window(10, 10, 80, 25);

/* output some text in the window */ * P$ {1 N7 Q4 K/ _% R7 Tcprintf("Hello world\r\n");

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/* wait for a key */ getch(); 4 G% M8 j" y0 ureturn 0; 4 r. D; k% T( J8 K% q& F+ S} + y. i5 K: C& G; g4 [& F7 G+ \* t ; h4 J* g/ s) i

函数名: cputs 功 能: 写字符到屏幕 8 O( [9 ]9 F7 @; |用 法: void cputs(const char *string); 程序例:

#include

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int main(void) $ |( i, v7 g/ ?/ ~{ 0 Z3 \5 K$ i5 ~% s+ n7 _, K/* clear the screen */ 5 J* s' T; \/ q: \& A& pclrscr();

/* create a text window */ 7 w$ \ C) b) P5 ]window(10, 10, 80, 25);

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/* output some text in the window */ cputs("This is within the window\r\n");

/* wait for a key */ % U1 p: C" [2 \" @getch(); return 0; 0 C* Q0 c. z4 t" \5 b+ W; w} 1 u% A2 {( [2 l1 ?

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 用 法: int creat (const char *filename, int permiss); 程序例:

#include ; V6 y. X6 k8 t' j }#include #include 2 a! [7 C: b( z4 S, c#include

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int main(void) - k1 s J. h6 M. g# w' o" g{ 5 m; x$ Y! C" X, h7 e1 \6 A+ Cint handle; 8 K6 |3 Y% q9 y7 K/ [: u8 |char buf[11] = "0123456789";

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

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

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/* write 10 bytes to the file */ 3 C- [% {& I# R Vwrite(handle, buf, strlen(buf));

/* close the file */ close(handle); return 0; : r- T- U1 A! g. g8 ?! d} / d1 e; R7 d, s: O: \. f; \& v

函数名: creatnew 功 能: 创建一个新文件 用 法: int creatnew(const char *filename, int attrib); 7 h% V' K/ m' n! n+ u* j+ Z% r9 x程序例:

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#include - `) \4 k& u1 P0 c2 e#include ) D& r" |0 c, J( Y#include #include #include

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int main(void) { 6 N, g* _2 t* O$ ]$ P8 S% eint handle; char buf[11] = "0123456789";

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

if (handle == -1) printf("DUMMY.FIL already exists.\n"); 0 \* w4 @% Q: I4 j* r* k" Qelse . C( b! g. K( ~- I, K; ]{ 6 {) W6 a: z% \& o, a7 x5 J2 e1 c! wprintf("DUMMY.FIL successfully created.\n"); write(handle, buf, strlen(buf)); . R9 F6 Z) x+ Pclose(handle); } return 0; } * n- U$ k6 Z+ N# K `: A8 n' D * {1 u6 O1 p- y. X

函数名: creattemp $ ?+ _" _+ D$ k% H' P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); - C- Y b) b0 |' h. P; m8 a3 W8 r程序例:

#include #include ( W& p/ h: j# x; L+ c#include

int main(void) : Q" d! x: |! F/ j: G{ int handle; char pathname[128];

strcpy(pathname, "\\");

/* create a unique file in the root directory */ handle = creattemp(pathname, 0);

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printf("%s was the unique file created.\n", pathname); . |. o3 [% I" [6 R2 uclose(handle); return 0; } 1 e i) ?, i& J3 ? ' u7 c4 I' W% v9 }& x6 `6 m, ~" ^. J

函数名: cscanf 功 能: 从控制台执行格式化输入 用 法: int cscanf(char *format[,argument, ...]); , N) Y0 q" I8 j+ C程序例:

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#include

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

/* clear the screen */ " d" s% m4 h# Z% b% Yclrscr();

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

/* read the input */ * z: y, H0 m# o: Z% r1 Kcscanf("%s", string);

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/* display what was read */ # _7 Q9 T/ \* C. Scprintf("\r\nThe string entered is: %s", string); return 0; } ! P7 n) C9 a+ H |: v2 o 4 I" K9 z! T$ S& G9 C7 ]5 ` * B, e% K( ~) x: }

函数名: ctime 功 能: 把日期和时间转换为字符串 - y3 I9 k0 j$ h' V& G用 法: char *ctime(const time_t *time); 程序例:

#include #include

int main(void) { time_t t;

time(&t); printf("Today's date and time: %s\n", ctime(&t)); 7 _6 F% m' y4 o5 @* freturn 0; } * ~9 [+ G5 R9 o9 Y) Q6 @ 1 r1 `4 c- a; c

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函数名: ctrlbrk : @ f$ @9 N w, H7 n功 能: 设置Ctrl-Break处理程序 % z8 C# K% |1 K. M- ^4 I9 v用 法: void ctrlbrk(*fptr)(void); 程序例:

#include #include

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#define ABORT 0

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int c_break(void) ! ^' O& }6 D" k1 x6 S4 B{ printf("Control-Break pressed. Program aborting ...\n"); return (ABORT); + F% X8 E# @" N; D R}

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int main(void) { , C# L; _5 A, J# R/ L" {. L- pctrlbrk(c_break); 4 A9 Q# Z6 T8 z: ^" ^" I2 Sfor(;;) { / h- D: F6 |2 U; Lprintf("Looping... Press to quit:\n"); } return 0; / G+ a! c0 C3 ^( T h) | z}

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

zjf

[em49]

谢谢啊

chenlk

有价值！

gssdzc

还是感谢分享。。。

hjl19890710hjl

特别感谢