c语言函数大全(s开头) (1).txt

C下的详细开发资料

for (color=1; color<=maxcolor; color++) 
{ 
/* clear the screen */ 
cleardevice(); 

/* select a new background color */ 
setcolor(color); 

/* output a messsage */ 
sprintf(msg, "Color: %d", color); 
outtextxy(x, y, msg); 
getch(); 
} 

/* clean up */ 
closegraph(); 
return 0; 
} 



函数名: setdate 
功 能: 设置DOS日期 
用 法: void setdate(struct date *dateblk); 
程序例: 

#include 
#include 
#include 

int main(void) 
{ 
struct date reset; 
struct date save_date; 

getdate(&save_date); 
printf("Original date:\n"); 
system("date"); 

reset.da_year = 2001; 
reset.da_day = 1; 
reset.da_mon = 1; 
setdate(&reset); 

printf("Date after setting:\n"); 
system("date"); 

setdate(&save_date); 
printf("Back to original date:\n"); 
system("date"); 

return 0; 
} 



函数名: setdisk 
功 能: 设置当前磁盘驱动器 
用 法: int setdisk(int drive); 
程序例: 

#include 
#include 

int main(void) 
{ 
int save, disk, disks; 

/* save original drive */ 
save = getdisk(); 

/* print number of logic drives */ 
disks = setdisk(save); 
printf("%d logical drives on the system\n\n", disks); 

/* print the drive letters available */ 
printf("Available drives:\n"); 
for (disk = 0;disk < 26;++disk) 
{ 
setdisk(disk); 
if (disk == getdisk()) 
printf("%c: drive is available\n", disk + 'a'); 
} 
setdisk(save); 

return 0; 
} 



函数名: setdta 
功 能: 设置磁盘传输区地址 
用 法: void setdta(char far *dta); 
程序例: 

#include 
#include 
#include 
#include 

int main(void) 
{ 
char line[80], far *save_dta; 
char buffer[256] = "SETDTA test!"; 
struct fcb blk; 
int result; 

/* get new file name from user */ 
printf("Enter a file name to create:"); 
gets(line); 

/* parse the new file name to the dta */ 
parsfnm(line, &blk, 1); 
printf("%d %s\n", blk.fcb_drive, blk.fcb_name); 

/* request DOS services to create file */ 
if (bdosptr(0x16, &blk, 0) == -1) 
{ 
perror("Error creating file"); 
exit(1); 
} 

/* save old dta and set new dta */ 
save_dta = getdta(); 
setdta(buffer); 

/* write new records */ 
blk.fcb_recsize = 256; 
blk.fcb_random = 0L; 
result = randbwr(&blk, 1); 
printf("result = %d\n", result); 

if (!result) 
printf("Write OK\n"); 
else 
{ 
perror("Disk error"); 
exit(1); 
} 

/* request DOS services to close the file */ 
if (bdosptr(0x10, &blk, 0) == -1) 
{ 
perror("Error closing file"); 
exit(1); 
} 

/* reset the old dta */ 
setdta(save_dta); 
return 0; 
} 



函数名: setfillpattern 
功 能: 选择用户定义的填充模式 
用 法: void far setfillpattern(char far *upattern, int color); 
程序例: 

#include 
#include 
#include 
#include 

int main(void) 
{ 
/* request auto detection */ 
int gdriver = DETECT, gmode, errorcode; 
int maxx, maxy; 

/* a user defined fill pattern */ 
char pattern[8] = {0x00, 0x70, 0x20, 0x27, 0x24, 0x24, 0x07, 0x00}; 

/* 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 */ 
} 

maxx = getmaxx(); 
maxy = getmaxy(); 
setcolor(getmaxcolor()); 

/* select a user defined fill pattern */ 
setfillpattern(pattern, getmaxcolor()); 

/* fill the screen with the pattern */ 
bar(0, 0, maxx, maxy); 

/* clean up */ 
getch(); 
closegraph(); 
return 0; 
} 



函数名: setfillstyle 
功 能: 设置填充模式和颜色 
用 法: void far setfillstyle(int pattern, int color); 
程序例: 

#include 
#include 
#include 
#include 
#include 

/* the names of the fill styles supported */ 
char *fname[] = { "EMPTY_FILL", 
"SOLID_FILL", 
"LINE_FILL", 
"LTSLASH_FILL", 
"SLASH_FILL", 
"BKSLASH_FILL", 
"LTBKSLASH_FILL", 
"HATCH_FILL", 
"XHATCH_FILL", 
"INTERLEAVE_FILL", 
"WIDE_DOT_FILL", 
"CLOSE_DOT_FILL", 
"USER_FILL" 
}; 

int main(void) 
{ 
/* request auto detection */ 
int gdriver = DETECT, gmode, errorcode; 
int style, midx, midy; 
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; 

for (style = EMPTY_FILL; style < USER_FILL; style++) 
{ 
/* select the fill style */ 
setfillstyle(style, getmaxcolor()); 

/* convert style into a string */ 
strcpy(stylestr, fname[style]); 

/* fill a bar */ 
bar3d(0, 0, midx-10, midy, 0, 0); 

/* output a message */ 
outtextxy(midx, midy, stylestr); 

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

/* clean up */ 
getch(); 
closegraph(); 
return 0; 
} 



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 
#include 
#include 
#include 

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; 
} 



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 
#include 
#include 
#include 

#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; 
} 




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 
#include 
#include #include 

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; 
} 




函数名: setjmp 
功 能: 非局部转移 
用 法: int setjmp(jmp_buf env); 
程序例: 

#include 
#include 
#include 

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); 
} 



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 
#include 
#include 
#include 
#include 

/* 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; 
} 




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 
#include 
#include 

int main(void) 
{ 
char *dest; 

dest = calloc(21, sizeof(char)); 
setmem(dest, 20, 'c'); 
printf("%s\n", dest); 

return 0; 
} 




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 
#include 
#include 

int main(void) 
{