C语言 cleardevice()用法及代码示例

头文件graphics.h包含cleardevice()函数，该函数在图形模式下清除屏幕并将当前位置设置为(0,0)。清除屏幕包括用当前背景色填充屏幕。

用法:

void cleardevice();

以下是cleardevice()在C中的实现：

// C Implementation for cleardevice() 
#include <graphics.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; 
  
    // initgraph initializes the 
    // graphics system by loading a 
    // graphics driver from disk 
    initgraph(&gd, &gm, ""); 
  
    // set the background colour as GREEN 
    setbkcolor(GREEN); 
  
    // outtext function displays 
    // text at current position. 
    outtext("Press any key to clear the screen."); 
  
    getch(); 
  
    // cleardevice function 
    cleardevice(); 
  
    outtext("Press any key to exit..."); 
  
    getch(); 
  
    // closegraph function closes the 
    // graphics mode and deallocates 
    // all memory allocated by 
    // graphics system . 
    closegraph(); 
  
    return 0; 
}

输出：

On executing the program, the output window looks like:

On pressing any key:

To exit, press any key.

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注：本文由纯净天空筛选整理自Sahil_Bansall大神的英文原创作品 cleardevice() function in C。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。