函数大全(c开头)

韩冰

函数大全(c开头)

函数名: cabs - a# Y3 ]8 l8 e- A功 能: 计算复数的绝对值 用 法: double cabs(struct complex z); 程序例:

#include $ z. F4 x( y7 [# M- E$ v, S#include

int main(void) # ~" A1 E) \* s4 W$ t: Y+ C{ struct complex z; 7 [! J* j: _1 h' A \double val;

z.x = 2.0; ) s7 v* E- c1 r" w/ G0 S$ u/ H4 h7 V- cz.y = 1.0; 3 B2 r0 t' g" b o/ x/ A2 Aval = cabs(z);

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printf("The absolute value of %.2lfi %.2lfj is %.2lf", z.x, z.y, val); return 0; " A3 H5 ]' ?2 M9 ^, D3 [} 2 n4 ~8 Q+ j3 C" A) `8 X) z % F: e/ g- j$ s0 f1 g' a+ o 1 r9 N; |1 I2 l+ ~* Q9 k0 Z

函数名: calloc 功 能: 分配主存储器 # S" M& {' Z }% b _" @: a用 法: void *calloc(size_t nelem, size_t elsize); 8 m4 p& d& g7 i# ]5 V% z9 \程序例:

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#include #include

int main(void) # Z. i7 W. M5 h- e/ [$ J{ / G8 L) u" T; \6 S( l8 i9 E: ~1 zchar *str = NULL;

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

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/* copy "Hello" into string */ - y" D8 B& c, p; b _# y7 j, d* W# sstrcpy(str, "Hello");

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

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/* free memory */ free(str);

return 0; , `( o2 G" f8 K( v& y} : b0 p8 t# D+ b' ^, u; h* C B, S- P5 U+ S( W: N6 d

函数名: ceil 功 能: 向上舍入 用 法: double ceil(double x); , z, T C3 _1 y. M程序例:

#include #include

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int main(void) { 3 T A) x9 I) u8 E; v; w+ u2 Kdouble number = 123.54; double down, up;

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down = floor(number); " d9 V8 C S5 }up = ceil(number);

printf("original number %5.2lf\n", number); " t' D& ~4 s: m: k* \: ?printf("number rounded down %5.2lf\n", down); 1 j# U4 P a( u: u: vprintf("number rounded up %5.2lf\n", up);

return 0; + T4 S% _. F- w% f0 ~/ c* C; l} 7 |& B( ~% a- ^: D; [4 ] + A1 `; `1 a, m+ X4 a# T

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函数名: cgets 功 能: 从控制台读字符串 用 法: char *cgets(char *str); $ N5 o0 A/ Q0 u程序例:

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#include #include

int main(void) { ) X) W* H c' d7 tchar buffer[83]; & s. P- H0 z4 ]2 A/ {% L3 uchar *p;

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/* There's space for 80 characters plus the NULL terminator */ 9 U% e) p1 @8 y; k4 o& Rbuffer[0] = 81;

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printf("Input some chars:"); p = cgets(buffer); # M0 l0 L) }$ E4 jprintf("\ncgets read %d characters: \"%s\"\n", buffer[1], p); printf("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 */ ' R4 w+ Z6 V# [. f0 z' Mbuffer[0] = 6;

printf("Input some chars:"); p = cgets(buffer); printf("\ncgets read %d characters: \"%s\"\n", buffer[1], p); 8 d9 t3 t- f% Zprintf("The returned pointer is %p, buffer[0] is at %p\n", p, &buffer); ; c) D5 l, g1 a4 s2 H: \return 0; } ( u; T. D* ]8 l

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函数名: chdir 功 能: 改变工作目录 用 法: int chdir(const char *path); 程序例:

#include . Z" e: h, [5 n2 N#include " |$ |% E( Y0 @. D9 y- H, X& `#include

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

int main(void) { if (getcurdir(0, old_dir)) { perror("getcurdir()"); exit(1); * G* ~/ m0 B. l; k9 t$ s8 Z} % P: q Y3 O& \- ^( @5 D6 k- ], wprintf("Current directory is: \\%s\n", old_dir);

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if (chdir("\\")) { , J; ?9 O# X1 X" w t) t6 X3 Pperror("chdir()"); : I, z8 P" h4 n% \: g' G) Cexit(1); , [0 A7 E$ ]' @, ?}

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if (getcurdir(0, new_dir)) * k3 v, }* G1 f0 w& @{ - o3 y- @: Z/ g4 Hperror("getcurdir()"); : d, K2 c4 \: {' d2 lexit(1); 9 l0 W( t/ F) J. E} % M& g, K, A( g' fprintf("Current directory is now: \\%s\n", new_dir);

printf("\nChanging back to orignal directory: \\%s\n", old_dir); if (chdir(old_dir)) { & C8 I5 B( S' h4 ^0 P; `9 ?perror("chdir()"); exit(1); 6 J7 d& m: U; W0 g- i$ E}

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return 0; & ^5 H% Z. i! s. L} 3 g, I7 I4 l7 M9 z2 v - Y& ]! ^4 p/ ~% R( ]

函数名: _chmod, chmod 5 }, h5 n7 c5 l) I& v+ Z% [功 能: 改变文件的访问方式 用 法: int chmod(const char *filename, int permiss); # c' Z8 N z5 c) N2 O5 @1 m程序例:

#include # b/ X3 q3 v$ e1 |. a#include #include

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void make_read_only(char *filename);

int main(void) { make_read_only("NOTEXIST.FIL"); & d9 a, B5 I3 L* s0 g. D" b3 o* ?; xmake_read_only("MYFILE.FIL"); return 0; + S% n" g/ i! t$ I}

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void make_read_only(char *filename) 1 M9 X I( I* n! \{ + G3 X; w, I9 X% }( V; Dint stat;

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stat = chmod(filename, S_IREAD); if (stat) printf("Couldn't make %s read-only\n", filename); " m# B u3 g6 {3 e$ Kelse printf("Made %s read-only\n", filename); }

函数名: chsize 功 能: 改变文件大小 ( Z) }4 X6 c) k用 法: int chsize(int handle, long size); 7 E0 u; j( S. ?$ Q+ h" r+ Y7 V程序例:

#include #include 5 w, R4 w, N+ g2 Q! ]0 G#include

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int main(void) 0 T6 C5 i( e! r{ 5 }) `$ }, _# c: x" wint handle; 8 l9 y9 w* i% L8 n( d- @% \char buf[11] = "0123456789";

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/* create text file containing 10 bytes */ 2 ^5 s, ]& Y0 M% `+ Hhandle = open("DUMMY.FIL", O_CREAT); write(handle, buf, strlen(buf));

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

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/* close the file */ z: X* n+ H: f& \close(handle); , i. S4 e1 A1 J- G; dreturn 0; 5 r) Z T5 M" R) |! j% o3 b2 Q} 5 x$ a/ _3 c! z

函数名: circle 功 能: 在给定半径以(x, y)为圆心画圆 % A* Y+ D4 p- U5 n- {7 Y0 h: i% Z! z用 法: void far circle(int x, int y, int radius); 程序例:

#include 9 x" y& i' H! D1 \#include #include 1 X" J6 ~; D; u9 P1 U#include

int main(void) % k. q( f4 q* A* ~- A, o5 H7 f{ /* request auto detection */ int gdriver = DETECT, gmode, errorcode; int midx, midy; ( C8 A! @$ u& u9 mint radius = 100;

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

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/* read result of initialization */ & z; a# J% d8 |) _ eerrorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ , Y5 R! R% d8 d- e+ @{ printf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); s5 k( r1 z3 i* m7 n9 ^getch(); + \8 @( N1 R+ [3 _2 aexit(1); /* terminate with an error code */ & Z! A, Q7 b; B3 {- ]" j}

midx = getmaxx() / 2; midy = getmaxy() / 2; setcolor(getmaxcolor());

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

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/* clean up */ * x6 ~2 H+ Q8 S( t0 b0 q& G: ggetch(); closegraph(); return 0; } 5 B* f/ k0 f5 b" z: D0 w0 V ! O6 e) F z0 a! |- u0 u: t; Y+ B

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函数名: cleardevice 功 能: 清除图形屏幕 用 法: void far cleardevice(void); 程序例:

#include #include $ X( E! O& d" q/ ^: ~) X#include #include

int main(void) { + _2 D9 d" w1 ?/ p t' r N% y/* request auto detection */ * ^9 b! c% E8 Y% H# ?3 Pint gdriver = DETECT, gmode, errorcode; 3 n4 m0 w, T% ?; W- u% o% A7 mint midx, midy;

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

/* read result of initialization */ errorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ 9 D4 l4 L" A( F# q3 V% N{ printf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); exit(1); /* terminate with an error code */ }

midx = getmaxx() / 2; midy = getmaxy() / 2; ) |* q7 @& O4 @0 m6 @setcolor(getmaxcolor());

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/* for centering screen messages */ / |) s& v9 L8 s7 k8 D9 o* \ Tsettextjustify(CENTER_TEXT, CENTER_TEXT);

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

/* wait for a key */ ! V) w+ N1 k* s. H& Dgetch();

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/* clear the screen */ cleardevice();

/* output another message */ 2 q# l$ ^" ~- y3 Q* ]+ oouttextxy(midx, midy, "press any key to quit:");

/* clean up */ $ c* B5 M2 t. K* v. s9 q4 xgetch(); closegraph(); return 0; } . V3 |; S' V' A" \ 9 N8 G: Z; v; B& f 8 @3 l( X3 f/ Y

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函数名: clearerr 功 能: 复位错误标志 - `' B6 F0 ~( B+ C. X用 法:void clearerr(FILE *stream); 程序例:

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#include

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int main(void) { 6 D+ k) A4 S& vFILE *fp; 0 ~6 \& Z" h* q$ |1 Y0 Lchar ch;

/* open a file for writing */ 0 }. b8 Q. Z4 g( I5 `fp = fopen("DUMMY.FIL", "w");

/* force an error condition by attempting to read */ : s' g h5 z: ?$ [7 ^ch = fgetc(fp); printf("%c\n",ch);

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if (ferror(fp)) , B0 j* J; i1 W- O. p{ /* display an error message */ printf("Error reading from DUMMY.FIL\n");

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/* reset the error and EOF indicators */ E ^. N6 i* Z$ I- Cclearerr(fp); }

fclose(fp); return 0; ; h. _! M) q$ V} ! N3 v1 v: n( B 4 `, U# U; {8 e" O; d" O- L1 l . T8 d6 E: k& a4 L0 g. z

函数名: clearviewport % q& N% b1 S# B) B4 h功 能: 清除图形视区 3 h1 r; W# u6 V1 U1 ]9 ^) E' G8 I( R* L用 法: void far clearviewport(void); 程序例:

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#include % o" Y6 L2 H( h! W: ~& z#include #include #include

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

int main(void) " Q4 U0 a8 a7 P1 H{ . ?- h: n5 R: e, o/* request auto detection */ 9 a4 G r {8 uint gdriver = DETECT, gmode, errorcode; 3 L7 \8 Z1 j: d1 ]int ht;

/* initialize graphics and local variables */ 2 N9 |3 Z; X$ z& T3 b6 \4 S& Z5 iinitgraph(&gdriver, &gmode, "");

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/* read result of initialization */ ( e/ ~" m! L0 n( Y+ uerrorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ { 0 d9 ~- Y- n! p$ P5 Vprintf("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()); " Q& c" S7 L* r7 d2 Sht = textheight("W");

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/* message in default full-screen viewport */ outtextxy(0, 0, "* <-- (0, 0) in default viewport");

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/* create a smaller viewport */ % U9 t1 k. k1 f( Bsetviewport(50, 50, getmaxx()-50, getmaxy()-50, CLIP_ON);

/* display some messages */ 9 [4 Q3 S. O$ c6 u& f$ ^outtextxy(0, 0, "* <-- (0, 0) in smaller viewport"); 7 n% H6 J, Z F5 P. g3 E: G/ S- Couttextxy(0, 2*ht, "Press any key to clear viewport:");

/* wait for a key */ getch();

/* clear the viewport */ " x; J& \6 r! y9 J# rclearviewport();

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/* output another message */ 8 z; H: W) q1 j( ]3 T4 t( k; `8 Nouttextxy(0, 0, "Press any key to quit:");

/* clean up */ $ `5 _0 A3 H4 F0 \getch(); 0 y2 _0 E/ M$ p% S5 gclosegraph(); return 0; } + X' Y+ o w% f & U. q$ D- ]0 W! V% Q/ O: f: f

函数名: _close, close + C7 i" W/ f6 n功 能: 关闭文件句柄 用 法: int close(int handle); 8 a5 f) p9 Y, u/ r8 L' x2 Y% b A3 T+ J程序例:

#include #include / {( n- x- ^( f' j#include * \ f8 ?7 R! k" Q1 p$ [#include

main() / v5 X \' t* p0 ]1 y' W# \6 K{ int handle; char buf[11] = "0123456789";

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/* create a file containing 10 bytes */ 8 _: `& \; F2 b5 ]+ Thandle = open("NEW.FIL", O_CREAT); if (handle > -1) { write(handle, buf, strlen(buf));

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/* close the file */ close(handle); * F" @- ` z* O' r0 `. S} else / ]1 r# K/ m4 T3 W7 R! Y/ \! v4 _' c{ " X$ t% q, w# `6 g( z& uprintf("Error opening file\n"); } return 0; }

函数名: clock . `* Z/ a$ y. G. L# Z; K功 能: 确定处理器时间 用 法: clock_t clock(void); , Y) S* O: O2 ?程序例:

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#include 8 D+ Z, Y8 w$ G2 }# @8 w- y6 X8 T6 v1 g#include ! d$ Q' `8 |; m v( }#include

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int main(void) { 7 p. J( ?: i- G) }% j4 kclock_t start, end; start = clock();

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delay(2000);

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

return 0; " e2 ], S8 C# y0 ~4 Y3 R} 5 P. ^3 n9 n+ j! h6 v. I

函数名: closegraph 功 能: 关闭图形系统 3 c* I, Z3 u9 R5 w, z, M用 法: void far closegraph(void); , p6 i" h" e: y, T程序例:

#include L7 v- i9 d; e5 J#include #include #include

int main(void) { /* request auto detection */ int gdriver = DETECT, gmode, errorcode; * _; g. z. C% s' wint x, y;

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

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/* read result of initialization */ ( D/ l0 W/ P* B1 [- `, O( kerrorcode = graphresult();

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if (errorcode != grOk) /* an error occurred */ $ \6 A u2 z2 ~$ D4 s{ 4 h n' Z1 T4 E) Dprintf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); 3 ]6 v8 p$ |) j9 Z1 J. F* Lgetch(); , i" D% _* \) X0 B# ~6 @exit(1); /* terminate with an error code */ }

x = getmaxx() / 2; / @$ j- {0 U# W% hy = getmaxy() / 2;

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/* output a message */ E" [0 }; u/ X+ j# s2 o8 D( Msettextjustify(CENTER_TEXT, CENTER_TEXT); o4 P3 [1 `, p5 Xouttextxy(x, y, "Press a key to close the graphics system:");

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/* wait for a key */ - N; O* p+ x' p0 agetch();

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

printf("We're now back in text mode.\n"); 7 ]; e. D- W, w. _2 }" Y# v( H1 fprintf("Press any key to halt:"); * y- P! w4 s% L5 L6 ~% ngetch(); & `0 M6 x6 g4 q) h1 P& lreturn 0; }

函数名: clreol 功 能: 在文本窗口中清除字符到行末 / Z8 i3 E; h. R4 ^& @6 g- S2 x4 V用 法: void clreol(void); # T( Q6 K0 H0 m" U程序例:

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#include

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int main(void)

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{ 4 L. p7 i. b, Fclrscr(); cprintf("The function CLREOL clears all characters from the\r\n"); + s! q/ `$ [8 `! p4 z9 f4 Zcprintf("cursor position to the end of the line within the\r\n"); cprintf("current text window, without moving the cursor.\r\n"); cprintf("Press any key to continue . . ."); 5 m: U" L! M8 q# Q7 A$ K6 ugotoxy(14, 4); ! U7 H W& [3 v/ _getch();

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clreol(); getch();

return 0; } 4 U+ K5 e) M% M1 z$ O) `

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函数名: clrscr 功 能: 清除文本模式窗口 9 a+ ^) y b! k$ `3 h$ }- o& n! x! ]% ]用 法: void clrscr(void); 程序例:

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#include

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int main(void) ) L2 `+ G, n+ N# Y5 K+ L4 t{ int i;

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clrscr(); for (i = 0; i < 20; i++) " ~( h' |- d! a% p Ecprintf("%d\r\n", i); 4 s3 B E9 y! M1 L% D0 jcprintf("\r\nPress any key to clear screen"); getch();

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clrscr(); cprintf("The screen has been cleared!"); + S' Z+ c/ Z v6 Y+ xgetch();

return 0; } " h& w% o, x1 ]4 Y' r9 H, p * R" Q, L, g9 _0 q ; m% S$ G- ~$ W5 F) T# S F( a& L! r

函数名: coreleft 功 能: 返回未使用内存的大小 - K9 R" S& D; B7 O8 {& ]用 法: unsigned coreleft(void); & \) p8 I! b4 p( B; N程序例:

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#include 0 x: a, B' w- X: T' T$ _9 J#include

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int main(void) { printf("The difference between the highest allocated block and\n"); 3 ^( f* h0 C& E; [6 Tprintf("the top of the heap is: %lu bytes\n", (unsigned long) coreleft());

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return 0; . H. p0 m9 R- E' L; d} # O. `# U) ?9 T7 K: R. e

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函数名: cos 8 Z$ t7 W8 l3 q F+ H功 能: 余弦函数 用 法: double cos(double x); 程序例:

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#include #include

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int main(void) " b2 ^5 O& @% f. c- Q0 l8 G+ H{ double result; ; B" P7 I/ C5 S* K' vdouble x = 0.5;

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result = cos(x); ; ~! e: Y/ c, }& {printf("The cosine of %lf is %lf\n", x, result); return 0; } 1 U% G3 T! z4 K r 2 ], E1 u7 Q) u; f( F+ O

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函数名: cosh 5 J a, j' z) ^功 能: 双曲余弦函数 用 法: dluble cosh(double x); : O4 U& d) w/ B1 Z2 `% b& ~0 G$ O程序例:

#include #include

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

result = cosh(x); printf("The hyperboic cosine of %lf is %lf\n", x, result); return 0; } + S: Y8 r. S2 p, E" e y 4 F. l2 w9 P: Z. ]. r# b

函数名: country 5 q; o; A( D9 n _ D. \* q I4 L& D功 能: 返回与国家有关的信息 ) R e1 f( b p* O2 e) V用 法: struct COUNTRY *country(int countrycode, struct country *country); 0 I3 L! y9 ?8 B% |8 }2 a6 j程序例:

#include 2 `1 f6 x5 _. V' l2 q#include

#define USA 0

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int main(void) : Y% w. J9 t" I; X, T$ C* N, Q/ ]{ ( O; n% L$ }# g( ~; Vstruct COUNTRY country_info;

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country(USA, &country_info); printf("The currency symbol for the USA is: %s\n", country_info.co_curr); return 0; } " w7 Y9 t' R2 f6 E% E 0 |/ o. l: C% |( v: R7 C7 P, x

函数名: cprintf 9 D! |. R p7 E功 能: 送格式化输出至屏幕 用 法: int cprintf(const char *format[, argument, ...]); 程序例:

#include

int main(void) { 1 J' E! F$ g5 ~/ o6 ~+ _/* clear the screen */ clrscr();

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

/* output some text in the window */ 6 [: a' y6 m2 O* Bcprintf("Hello world\r\n");

/* wait for a key */ " c' L, }/ j; `, egetch(); 8 j- p# V" m" b* V. a8 sreturn 0; } ( y- C0 C/ ]7 ?1 J& f# {) b" |

函数名: cputs 功 能: 写字符到屏幕 ; s3 j2 X9 u, }- w0 z用 法: void cputs(const char *string); 程序例:

#include

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int main(void) ! e( M. H1 g8 X) u# h{ /* clear the screen */ clrscr();

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

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

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/* wait for a key */ % m- d# x9 |$ } `5 G' [6 xgetch(); 4 `8 R6 f$ y/ L0 l$ Jreturn 0; 4 L: p3 G3 ` h6 W/ k, t} ; i3 @7 B$ g* {6 @

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函数名: _creat creat $ h, |# ^/ j( F# Q8 K# G/ L8 Q8 B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); : f2 n* G$ T# D& n程序例:

#include 7 P q; J! B& e8 ~. [#include #include #include

int main(void) { $ P+ ]7 F& G) @ Q" [9 W7 E; c$ xint handle; char buf[11] = "0123456789";

/* change the default file mode from text to binary */ " I8 f1 C+ p$ |( b: J6 g% H_fmode = O_BINARY;

/* create a binary file for reading and writing */ / R/ t! E) f4 J; w* O& Hhandle = creat("DUMMY.FIL", S_IREAD | S_IWRITE);

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

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/* close the file */ close(handle); return 0; }

函数名: creatnew 9 h- l! r" l( |* g' \功 能: 创建一个新文件 用 法: int creatnew(const char *filename, int attrib); . c& I6 c0 b9 L$ D |4 ^( F# M程序例:

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#include #include #include 1 {; i. q4 k/ N$ T8 q _#include #include

int main(void) { , s6 x$ b/ _& u) r: Nint handle; , n, \) e& r( P" t: C* K. h0 Rchar buf[11] = "0123456789";

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/* attempt to create a file that doesn't already exist */ . J( Y- j- P- }$ @! `# ]9 V6 v1 \handle = creatnew("DUMMY.FIL", 0);

if (handle == -1) 2 E! @* s' O/ W" A- S0 r/ z8 kprintf("DUMMY.FIL already exists.\n"); ) s( W0 `5 P7 lelse 5 a+ O2 N" U& Y{ . u7 F% y. F: n. R* Y( H, _2 k; w* Mprintf("DUMMY.FIL successfully created.\n"); write(handle, buf, strlen(buf)); : I. D5 z% ^* }' K( Fclose(handle); } return 0; } " v/ u' s8 u1 c' n; n$ s; g1 s$ f' e 7 n, E2 ]: s9 I1 y& k

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函数名: creattemp $ c4 h& |) W2 e0 p: j& m+ E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:

#include #include #include

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int main(void) { int handle; char pathname[128];

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strcpy(pathname, "\\");

/* create a unique file in the root directory */ 2 }+ v: [ I; ]! a Khandle = creattemp(pathname, 0);

printf("%s was the unique file created.\n", pathname); close(handle); 7 L z3 n" i3 c( _( s& preturn 0; } & C6 _2 a4 b3 A0 v ' C% M( ^, d" r' D0 l

函数名: cscanf 功 能: 从控制台执行格式化输入 用 法: int cscanf(char *format[,argument, ...]); $ d9 ]0 c% q" ~* ^程序例:

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#include

int main(void) & e3 g0 L! l$ ]% C4 R/ Z{ / s4 q3 s& o0 V+ H' U5 uchar string[80];

/* clear the screen */ ! i2 i, s5 V9 h, cclrscr();

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/* Prompt the user for input */ 6 u1 D* a+ I1 B, ycprintf("Enter a string with no spaces:");

/* read the input */ 2 j# C9 k9 X6 T- [/ v/ i, _0 X3 f! lcscanf("%s", string);

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/* display what was read */ , \ ]' }( ~( Y4 Vcprintf("\r\nThe string entered is: %s", string); return 0; } X5 ^9 r% n5 a% a& ~# r0 l5 Q - T6 D1 }, K/ l: }4 T& @: f1 Q+ O

函数名: ctime 5 L7 L4 m9 G/ |" J5 Q% [; w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 3 I: H3 B" t4 H. K- w#include

int main(void) 4 j4 Y9 J- g- ?{ ( p5 Q( x2 e$ p) g. k; Ntime_t t;

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time(&t); printf("Today's date and time: %s\n", ctime(&t)); ( ]4 J s' k" treturn 0; } # I4 h* j$ e. y. O" x; @, i 0 b% w# W" ~: z7 d! l - ?" |. X _* B/ ]/ M' Y J: E+ f

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函数名: ctrlbrk 功 能: 设置Ctrl-Break处理程序 . N4 i& s" j$ u% D8 E用 法: void ctrlbrk(*fptr)(void); , E/ U3 U1 I) E. x/ T. H) ~1 A5 k程序例:

#include * T. {* f% P, v8 } b1 z+ J#include

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#define ABORT 0

int c_break(void) { % _) Q+ P6 M1 Tprintf("Control-Break pressed. Program aborting ...\n"); 1 p) \* l+ i/ Y3 B; ~2 b6 \( Kreturn (ABORT); 1 i+ }$ x- m/ J1 v7 L}

int main(void) 5 k5 R% R7 s) p& `9 X* U8 v' m h{ ' Q1 s! e2 K5 b3 z+ gctrlbrk(c_break); ) d' ~$ v. {2 t, _, _( dfor(;;) `/ Y/ ]/ B j" O& b{ , v( h5 F j( A6 _5 h& uprintf("Looping... Press to quit:\n"); 5 j' \. E k+ n/ a} return 0; # b9 V8 y7 i! E2 R3 T5 W" o}

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