在C图形中画圆-yiteyi-C++库

头文件显示图形。h包含 圆圈（） 函数，它画一个圆心在（x，y）和给定半径的圆。

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语法：

circle(x, y, radius);

where,
(x, y) is center of the circle.
'radius' is the Radius of the circle.

例如：

Input : x = 250, y = 200, radius = 50
Output : 

Input : x = 300, y = 150, radius = 90
Output :

下面是用C绘制圆的实现：

                     // C Implementation for drawing circle                   
                     #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,                               ""                               );                   
                             
                                         // circle function                   
                                         circle(250, 200, 50);                   
                             
                                         getch();                   
                             
                                         // closegraph function closes the                   
                                         // graphics mode and deallocates                   
                                         // all memory allocated by                   
                                         // graphics system .                   
                                         closegraph();                   
                             
                                         return                               0;                   
                     }                   

输出：

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