Question

描述：设计一个求空间两点距离的函数,要求第2个点的默认值为坐标原点.

Answer 1

#include

#include

#include

using namespace std;

float distance(float x1,float y1,float z1,float x2=0,float y2=0,float z2=0)

{

float distance_1;

distance_1=sqrt(pow(x1,2)+pow(y1,2)+pow(z1,2));

return distance_1;

}

int main()

{

float x1,y1,z1,x2,y2,z2;

cin>>x1>>y1>>z1;

cin>>x2>>y2>>z2;

cout