16.1.5【string字符串比较】

#include<iostream>
#include<stdlib.h>
#include<string>
using namespace std;


/*
    3.1.6 string字符串比较
        字符串比较是按字符的ASCII码进行对比
            = 返回 0
            > 返回 1
            < 返回 -1
        int compare(const string &s) const; //与字符串s比较
        int compare(const char *s) const; //与字符串s比较
*/


void test1()
{
    string s1 = "hello";
    string s2 = "hello";
    if(s1.compare(s2) == 0)
    {
        cout << "s1==s2" << endl;
    }

    s1 = "xello";
    s2 = "hello";
    if(s1.compare(s2) == 0)
    {
        cout << "s1==s2" << endl;
    }
    else if(s1.compare(s2) > 0)
    {
        cout << "s1 > s2" << endl;
    }
    else
    {
        cout << "s1 < s2" << endl;
    }
}


int main()
{
    test1();
    //字符串对比主要是用于比较两个字符串是否相等，判断谁大谁小的意义并不是很大

    system("pause");
    return 0;
}