CODE EXAMPLE FOR CPP

string to integer in c++

// C++ program to demonstrate working of stoi()
// Work only if compiler supports C++11 or above
// Because STOI() was added in C++ after 2011
#include <iostream>
#include <string>
using namespace std;
  
int main()
{
    string str1 = "45";
    string str2 = "3.14159";
    string str3 = "31337 geek";
  
    int myint1 = stoi(str1); // type of explicit type casting
    int myint2 = stoi(str2); // type of explicit type casting
    int myint3 = stoi(str3); // type of explicit type casting
  
    cout << "stoi("" << str1 << "") is " << myint1
         << '
';
    cout << "stoi("" << str2 << "") is " << myint2
         << '
';
    cout << "stoi("" << str3 << "") is " << myint3
         << '
';
  
    return 0;
}