C语言中的cleardevice（）函数-yiteyi-C++库

头文件显示图形。h包含 cleardevice（） 在图形模式下清除屏幕并将当前位置设置为（0,0）的功能。清除屏幕包括用当前背景色填充屏幕。

null

语法：

void cleardevice();

下面是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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