c1-17.cpp

清华版C++面向对象设计教材例题程序 C++面向对象设计教材例题程序

#include <iostream>
#include <string>
using namespace std;
int main()
{string string1,string2,string3,temp;
 cout<<"please input three strings:";   //这是对用户输入的提示
 cin>>string1>>string2>>string3;        //输入3个字符串
 if(string2>string3) {temp=string2;string2=string3;string3=temp;} //使串2≤串3
 if(string1<=string2) cout<<string1<<" "<<string2<<" "<<string3<<endl;
    //如果串1≤串2，则串1≤串2≤串3
 else if(string1<=string3) cout<<string2<<" "<<string1<<" "<<string3<<endl;
    //如果串1＞串2，且串1≤串3，则串2＜串1≤串3
 else cout<<string2<<" "<<string3<<" "<<string1<<endl;
    //如果串1＞串2，且串1＞串3，则串2≤串3＜串3
 return 0;
}