C語言 imagesize()用法及代碼示例

// C Implementation for imagesize() 
#include <graphics.h> 
#include <stdio.h> 
  
// driver code 
int main() 
{ 
    // gm is Graphics mode which is 
    // a computer display mode that 
    // generates image using pixels. 
    // DETECT is a macro defined in 
    // "graphics.h" header file 
    int gd = DETECT, gm, color, bytes; 
    char arr[100]; 
  
    // initgraph initializes the 
    // graphics system by loading a 
    // graphics driver from disk 
    initgraph(&gd, &gm, ""); 
  
    // Draws a circle with center at 
    // (200, 200) and radius as 50. 
    circle(200, 200, 50); 
  
    // draws a line with 2 points 
    line(150, 200, 250, 200); 
  
    // draws a line with 2 points 
    line(200, 150, 200, 250); 
  
    // imagesize function 
    bytes = imagesize(150, 150, 250, 250); 
  
    // sprintf stands for “String print”. 
    // Instead of printing on console, 
    // it store output on char buffer 
    // which are specified in sprintf 
    sprintf(arr, "Number of bytes required "
         "to store required area = %d", bytes); 
  
    // outtext function displays text 
    // at current position. 
    outtextxy(20, 280, arr); 
  
    getch(); 
  
    // closegraph function closes the 
    // graphics mode and deallocates 
    // all memory allocated by 
    // graphics system . 
    closegraph(); 
  
    return 0; 
}