string转为int
string str = "100000";
stringstream ss;
ss << str;
int i;
ss >> i;
printf("%d", i);
int转为string
#include<bits/stdc++.h>
using namespace std;
int main()
{
int m = 1000;
string str = to_string(m);
cout << str;
}
原文：https://www.cnblogs.com/legendcong/p/9615083.html