第一张是编译之前的,编译之后就变成第二张了,我也用我室友的电脑试过,也是这样,但是我用Visual Studio的时候就没问题,求大神解答
代码如下:
#include<iostream>
#include<cmath>
using namespace std;
class Point
{
private:
float x,y;
public:
Point(float a,float b):x(a),y(b){};
friend double distance(Point p1,Point p2);
};
double distance(Point p1,Point p2)
{
return sqrt((p1.x-p2.x)*(p1.x-p2.x)+(p1.y-p2.y)*(p1.y-p2.y));
}
int main()
{
float a1,a2,b1,b2;
cin>>a1>>b1>>a2>>b2;
Point p1(a1,b1),p2(a2,b2);
cout<<distance(p1,p2);
return 0;
}