string与int类型转换 && reserse()

reserse()反转函数—-STL string类

#include <iostream>#include <algorithm>#include <string>#include <sstream> //要使用stringstream流应包含此头文件using namespace std;int main(){stringstream stream; //声明一个stringstream变量int n;string str;cin >> n;//int转stringstream << n; //向stream中插入整数nstream >> str; reverse(str.begin(), str.end());//反转stream.clear(); //同一stream进行多次转换应调用成员函数clear//string转intstream << str; //向stream中插入整型数1234stream >> n; //从steam中提取刚插入的string 并将其赋予变量n完成字符型数到int的转换cout << n << endl; //输出strreturn 0;}