convert string into numberin c++ code example
Example 1: convert stirng to int c++
int thing = std::stoi(string);
Example 2: convert string to number c++
//stoi() : The stoi() function takes a string as an argument and
//returns its value. Supports C++11 or above.
// If number > 10^9 , use stoll().
#include <iostream>
#include <string>
using namespace std;
main() {
string str = "12345678";
cout << stoi(str);
}