Leetcode refers to offer jz5 to replace the space string

It can be seen from the meaning of the question , Simply traverse the string

#include<iostream>
using namespace std;
class Solution {
public:
    /**
     *  The class name in the code 、 Method name 、 The parameter name has been specified , Do not modify , Return the value specified by the method directly 
     *
     * 
     * @param s string character string  
     * @return string character string 
     */
    string replaceSpace(string s) {
        // write code here
        for(int i=0;i<s.size();i++){
            if(s[i]==' '){
                s[i]='%';
                s.insert(i+1,"20"); //string Class insert Method insert( Order of strings ,char Type string ）  for example s1.insert(6,str2), Is to s1 String number 6 Insert at the end str2 character string 
            }
        }
        return s;
    }
};