C中的弧函数

头文件graphics.h包含arc()函数，该函数绘制中心为(x，y)且给定半径的弧。 start_angle是角度的起点，而end_angle是角度的终点。角度值可以在0到360度之间变化。

句法 ：

void arc(int x, int y, int start_angle,
            int end_angle, int radius);

where,
(x, y) is the center of the arc.
start_angle is the starting angle and 
end_angle is the ending angle.
'radius' is the Radius of the arc.

例子 ：

输入：x = 250，y = 250，start_angle = 155，end_angle = 300，radius = 100输出： 输入：x = 250，y = 250，start_angle = 0，end_angle = 300，radius = 100;输出 ：

下面是arc()函数：

// C implementation of arc function
#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;
  
    // location of the arc
    int x = 250;
    int y = 250;
  
    // starting angle and ending angle
    // of the arc
    int start_angle = 155;
    int end_angle = 300;
  
    // radius of the arc
    int radius = 100;
  
    // initgraph initializes the graphics system
    // by loading a graphics driver from disk
    initgraph(&gd, &gm, "");
  
    // arc function
    arc(x, y, start_angle, end_angle, radius);
  
    getch();
  
    // closegraph function closes the graphics
    // mode and deallocates all memory allocated
    // by graphics system
    closegraph();
  
    return 0;
}

输出：

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