C++作业2

1、分段函数求值

#include<iostream.h>void main(){int x,y;cout<<"输入x的值:";cin>>x;if(x>=1){y=x-1;}else if(x<1){y=-x+1;}cout<<y<<endl;}

2、两点距离

#include<stdio.h>#include<math.h>int main(){double x1,x2,y1,y2,distance;printf("请输入第一个点的坐标:\nx1=");scanf("%lf",&x1);printf("y1=");scanf("%lf",&y1);printf("请输入第二个点的坐标:\nx2=");scanf("%lf",&x2);printf("y2=");scanf("%lf",&y2);distance=sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));printf("这两点间距离为：%lf\n",distance);return 0;}