C语言中的putpixel()函数

头文件graphics.h包含putpixel()函数，该函数在指定颜色的位置(x，y)处绘制像素。
句法 ：

void putpixel(int x, int y, int color);

where, 
(x, y) is the location at which pixel
is to be put , and color specifies 
the color of the pixel.

说明：可以使用putpixel(50，40，RED)绘制(50，40)处的红色彩色像素。 putpixel()函数可用于使用各种算法绘制圆，线和椭圆。

以下是putpixel()函数。

// C Implementation for putpixel()
#include 
#include 
  
// 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;
  
    // initgraph initializes the
    // graphics system by loading a
    // graphics driver from disk
    initgraph(&gd, &gm, "");
  
    // putpixel function
    putpixel(85, 35, GREEN);
    putpixel(30, 40, RED);
    putpixel(115, 50, YELLOW);
    putpixel(135, 50, CYAN);
    putpixel(45, 60, BLUE);
    putpixel(20, 100, WHITE);
    putpixel(200, 100, LIGHTBLUE);
    putpixel(150, 100, LIGHTGREEN);
    putpixel(200, 50, YELLOW);
    putpixel(120, 70, RED);
  
    getch();
  
    // closegraph function closes the
    // graphics mode and deallocates
    // all memory allocated by
    // graphics system .
    closegraph();
  
    return 0;
}

输出 ：

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