Getline int

#include<iostream>
#include<sstream>

int main(){
    std::stringstream ss;

    ss.clear();
    ss.str("");

    std::string input = "";

    int n;

    while (true){
        if (!getline(cin, input))
            return -1;

        ss.str(input);

        if (ss >> n)
            break;

        std::cout << "Invalid number, please try again" << std::endl;

        ss.clear();
        ss.str("");
        input.clear();
}

Source: stackoverflow.com

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