change type of variable from string to int c++ code example

Example 1: string to int c++

#include <iostream>
#include <string>

int main() {

    std::string str = "123";
    int num;

    // using stoi() to store the value of str1 to x
    num = std::stoi(str);

    std::cout << num;

    return 0;
}

Example 2: how to convert from string to int in c++

#include <iostream>
#include <sstream>

using namespace std;

int main() {
    string s = "999";

    stringstream degree(s);

    int x = 0;
    degree >> x;

    cout << "Value of x: " << x;
}