C语言的函数!

内财数模协会 · 发表于 2004-5-10 16:38:15

<

>函数名: setftime
功能: 设置文件日期和时间
用法: int setftime(int handle, struct ftime *ftimep);
程序例: <

>#include <stdio.h>
#include <process.h>
#include <fcntl.h>
#include <io.h> <

>int main(void)
{
struct ftime filet;
FILE *fp; if ((fp = fopen("TEST.$$$", "w")) == NULL)
{
 perror("Error:");
 exit(1);
} fprintf(fp, "testing...\n"); /* load ftime structure with new time and date */
filet.ft_tsec = 1;
filet.ft_min = 1;
filet.ft_hour = 1;
filet.ft_day = 1;
filet.ft_month = 1;
filet.ft_year = 21; /* show current directory for time and date */
system("dir TEST.$$$"); /* change the time and date stamp*/
setftime(fileno(fp), &filet); /* close and remove the temporary file */
fclose(fp); system("dir TEST.$$$"); unlink("TEST.$$$");
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:38:26

<

>函数名: setgraphbufsize
功能: 改变内部图形缓冲区的大小
用法: unsigned far setgraphbufsize(unsigned bufsize);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>#define BUFSIZE 1000 /* internal graphics buffer size */ int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int x, y, oldsize;
char msg[80]; /* set the size of the internal graphics buffer */
/* before making a call to initgraph. */
oldsize = setgraphbufsize(BUFSIZE); /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
 printf("Graphics error: %s\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} x = getmaxx() / 2;
y = getmaxy() / 2; /* output some messages */
sprintf(msg, "Graphics buffer size: %d", BUFSIZE);
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(x, y, msg);
sprintf(msg, "Old graphics buffer size: %d", oldsize);
outtextxy(x, y+textheight("W"), msg); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:38:38

<

>函数名: setgraphmode
功能: 将系统设置成图形模式且清屏
用法: void far setgraphmode(int mode);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int x, y; /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
 printf("Graphics error: %s\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} x = getmaxx() / 2;
y = getmaxy() / 2; /* output a message */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(x, y, "Press any key to exit graphics:");
getch(); /* restore system to text mode */
restorecrtmode();
printf("We're now in text mode.\n");
printf("Press any key to return to graphics mode:");
getch(); /* return to graphics mode */
setgraphmode(getgraphmode()); /* output a message */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(x, y, "We're back in graphics mode.");
outtextxy(x, y+textheight("W"), "Press any key to halt:"); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:38:49

<

>函数名: setjmp
功能: 非局部转移
用法: int setjmp(jmp_buf env);
程序例: <

>#include <stdio.h>
#include <process.h>
#include <setjmp.h> <

>void subroutine(void); jmp_buf jumper; int main(void)
{
int value; value = setjmp(jumper);
if (value != 0)
{
 printf("Longjmp with value %d\n", value);
 exit(value);
}
printf("About to call subroutine ... \n");
subroutine();
return 0;
} void subroutine(void)
{
longjmp(jumper,1);
}

内财数模协会 · 发表于 2004-5-10 16:39:00

<

>函数名: setlinestyle
功能: 设置当前画线宽度和类型
用法: void far setlinestyle(int linestype, unsigned upattern);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <conio.h> <

>/* the names of the line styles supported */
char *lname[] = {
"SOLID_LINE",
"DOTTED_LINE",
"CENTER_LINE",
"DASHED_LINE",
"USERBIT_LINE"
}; int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode; int style, midx, midy, userpat;
char stylestr[40]; /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
 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; /* a user defined line pattern */
/* binary: "0000000000000001" */
userpat = 1; for (style=SOLID_LINE; style<=USERBIT_LINE; style++)
{
 /* select the line style */
 setlinestyle(style, userpat, 1); /* convert style into a string */
 strcpy(stylestr, lname[style]); /* draw a line */
 line(0, 0, midx-10, midy); /* draw a rectangle */
 rectangle(0, 0, getmaxx(), getmaxy()); /* output a message */
 outtextxy(midx, midy, stylestr); /* wait for a key */
 getch();
 cleardevice();
} /* clean up */
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:39:10

<

>函数名: setmem
功能: 存值到存储区
用法: void setmem(void *addr, int len, char value);
程序例: <

>#include <stdio.h>
#include <alloc.h>
#include <mem.h> <

>int main(void)
{
char *dest; dest = calloc(21, sizeof(char));
setmem(dest, 20, 'c');
printf("%s\n", dest); return 0;
}

内财数模协会 · 发表于 2004-5-10 16:39:19

<

>函数名: setmode
功能: 设置打开文件方式
用法: int setmode(int handle, unsigned mode);
程序例: <

>#include <stdio.h>
#include <fcntl.h>
#include <io.h> <

>int main(void)
{
int result; result = setmode(fileno(stdprn), O_TEXT);
if (result == -1)
 perror("Mode not available\n");
else
 printf("Mode successfully switched\n");
return 0;
}


 函数名: setpalette

内财数模协会 · 发表于 2004-5-10 16:39:35

<

>函数名: setpalette
功能: 改变调色板的颜色
用法: void far setpalette(int index, int actural_color);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int color, maxcolor, ht;
int y = 10;
char msg[80]; /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
 printf("Graphics error: %s\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} maxcolor = getmaxcolor();
ht = 2 * textheight("W"); /* display the default colors */
for (color=1; color<=maxcolor; color++)
{
 setcolor(color);
 sprintf(msg, "Color: %d", color);
 outtextxy(1, y, msg);
 y += ht;
} /* wait for a key */
getch(); /* black out the colors one by one */
for (color=1; color<=maxcolor; color++)
{
 setpalette(color, BLACK);
 getch();
} /* clean up */
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:39:47

<

>函数名: setrgbpalette
功能: 定义IBM8514图形卡的颜色
用法: void far setrgbpalette(int colornum, int red, int green, int blue);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>int main(void)
{
/* select a driver and mode that supports the use */
/* of the setrgbpalette function. */
int gdriver = VGA, gmode = VGAHI, errorcode;
struct palettetype pal;
int i, ht, y, xmax; /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
 printf("Graphics error: %s\n", grapherrormsg(errorcode));
 printf("Press any key to halt:");
 getch();
 exit(1); /* terminate with an error code */
} /* grab a copy of the palette */
getpalette(&pal); /* create gray scale */
for (i=0; i<pal.size; i++)
 setrgbpalette(pal.colors, i*4, i*4, i*4); /* display the gray scale */
ht = getmaxy() / 16;
xmax = getmaxx();
y = 0;
for (i=0; i<pal.size; i++)
{
 setfillstyle(SOLID_FILL, i);
 bar(0, y, xmax, y+ht);
 y += ht;
} /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:39:59

<

>函数名: settextjustify
功能: 为图形函数设置文本的对齐方式
用法: void far settextjustify(int horiz, int vert);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>/* function prototype */
void xat(int x, int y); /* horizontal text justification settings */
char *hjust[] = { "LEFT_TEXT",
 "CENTER_TEXT",
 "RIGHT_TEXT"
 }; /* vertical text justification settings */
char *vjust[] = { "LEFT_TEXT",
"CENTER_TEXT",
"RIGHT_TEXT"
 }; int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int midx, midy, hj, vj;
char msg[80]; /* initialize graphics and local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
 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; /* loop through text justifications */
for (hj=LEFT_TEXT; hj<=RIGHT_TEXT; hj++)
 for (vj=LEFT_TEXT; vj<=RIGHT_TEXT; vj++)
 {
 cleardevice();
 /* set the text justification */
 settextjustify(hj, vj); /* create a message string */
 sprintf(msg, "%s %s", hjust[hj], vjust[vj]); /* create cross hairs on the screen */
 xat(midx, midy); /* output the message */
 outtextxy(midx, midy, msg);
 getch();
 } /* clean up */
closegraph();
return 0;
} /* draw an "x" at (x, y) */
void xat(int x, int y)
{
 line(x-4, y, x+4, y);
 line(x, y-4, x, y+4);
}

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C语言的函数!

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