返回字符串宽度 （以像素为单位）

[c]代码库

#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 = 0, y = 0; 
   int i; 
   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 */ 
   } 

   y = getmaxy() / 2; 

   settextjustify(LEFT_TEXT, CENTER_TEXT); 
   for (i=1; i<11; i++) 
   { 
      /* select the text style, direction, and size */ 
      settextstyle(TRIPLEX_FONT, HORIZ_DIR, i); 

      /* create a message string */ 
      sprintf(msg, "Size: %d", i); 

      /* output the message */ 
      outtextxy(x, y, msg); 

      /* advance to the end of the text */ 
      x += textwidth(msg); 
   } 

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