c语言库函数(s类字母) - 1.txt

C语言库函数合集

}  
   
   

函数名: setcbrk  
功  能: 设置Control-break  
用  法: int setcbrk(int value);  
程序例:  

#include <dos.h>  
#include <conio.h>  
#include <stdio.h>  

int main(void)  
{  
   int break_flag;  

   printf("Enter 0 to turn control break off\n");  
   printf("Enter 1 to turn control break on\n");  

   break_flag = getch() - 0;  

   setcbrk(break_flag);  

   if (getcbrk())  
      printf("Cntrl-brk flag is on\n");  
   else  
      printf("Cntrl-brk flag is off\n");  
   return 0;  
}  
   
   
   

函数名: setcolor  
功  能: 设置当前画线颜色  
用  法: void far setcolor(int color);  
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 */  
   /* multiple drawing colors.               */  
   int gdriver = EGA, gmode = EGAHI, errorcode;  
   int color, maxcolor, x, y;  
   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 */  
   }  

   /* maximum color index supported */  
   maxcolor = getmaxcolor();  

   /* for centering text messages */  
   settextjustify(CENTER_TEXT, CENTER_TEXT);  
   x = getmaxx() / 2;  
   y = getmaxy() / 2;  

   /* loop through the available colors */  
   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 <stdio.h>  
#include <process.h>  
#include <dos.h>  

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 <stdio.h>  
#include <dir.h>  

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 <process.h>  
#include <string.h>  
#include <stdio.h>  
#include <dos.h>  

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

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

/* 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 <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;  
}  
   
   

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;  
}  
   
   
   

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;  
}