Question

用c++设计直线类,然后判断直线与圆的位置关系

Answer 1

#include

#include

class line //定义直线类

{

public:

x05float a,b,c; //标准式

};

class circle //定义圆类

{

public:

x05float x,y,r;//圆心及半径

};

int main(int argc,char**argv)

{

x05line myline;

x05circle mycircle;

x05

x05coutmyline.a;

x05coutmyline.b;

x05coutmyline.c;

x05coutmycircle.x;

x05coutmycircle.y;

x05coutmycircle.r;

x05float mydistance;

x05mydistance=fabs(myline.a*mycircle.x+myline.b*mycircle.y+myline.c)/sqrt(myline.a*myline.a+myline.b*myline.b);//计算圆心与直线的距离

x05//比较R与圆心到直线的距离

x05if (mydistance