C++中string与int转换

string转int

#include <iostream>
#include <string>
 
using namespace std;
 
int main()
{
    char* s = "1234";
    string str("5678");
 
    int intS = atoi(s);
 
    //此写法会报错
    //int intStr = atoi(str);
    //需先将string转成char*
    int intStr = atoi(str.c_str());
 
    cout << "char* 转int:    " << intS << endl;
    cout << "string 转int:    " << intStr << endl;
 
    system("pause");
    return 0;
}