C语言函数—setmem

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: %sn", 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; 
} 
  
  
  

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