C++作业2

（1）标准体重

#include<iostream>using namespace std;int main(){double h,m,s;cout<<"您的身高是：(cm)";cin>>h;cout<<"您的体重是：(kg)";cin>>m;s=h-100;cout<<"您的标准体重为"<<s<<endl;if((s-m)-0.2*s>0)cout<<"您体重超轻";elseif((m-s)-0.2*s>0)cout<<"您体重超重";elsecout<<"您体重正常";    cout<<'\n';    return 0;}

（2）分段函数求值

#include<iostream>using namespace std;int main(){int x,y;cout<<"输入x的值:";cin>>x;if(x>=1)y=x-1;elsey=-x+1;cout<<"y的值为:"<<y<<endl;return 0;}

（3）两点距离

#include<iostream>#include<cmath>using namespace std;int main(){double x1,y1,x2,y2,d;cout<<"输入A点的坐标：";cin>>x1>>y1;cout<<"输入B点的坐标：";cin>>x2>>y2;d=sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));cout<<"A,B两点之间的距离为:"<<d<<endl;return 0;}