为图形函数设置文本的对齐方式

[c]代码库

#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); 
}