C++ 平方函数

Question

当我编译我的程序时，它似乎没有执行我的公式，我不知道我做错了什么帮助将不胜感激

int main ()
  {
int distance, Xvalue, Yvalue;
double x1,y1,x2,y2;

cout << "\n Please enter X1 value: ";
cin  >> x1;
cout << " Please enter X2 value: ";
cin  >> x2;
cout << "\n Please enter Y1 value: ";
cin  >> y1;
cout << " Please enter Y2 value: ";
cin  >> y2;
    Xvalue = (x1 - x2);
    Yvalue = (y1 - y2);
distance = sqrt(Xvalue * Xvalue + Yvalue * Yvalue);

cout << "This is the distance between the two points" <<distance<< 


   cout << endl << endl;
   system ("pause");
  return 0;
 }

Answer 1

改变距离，Xvalue 和 Yvalue 成双