#include <iostream>
#include <ctime>
#include <cmath>

using namespace std;

void Options(int input) {
    switch(input) {
        case 1:
            cout << "This is case 1!" << endl;
            break;
        case 2:
            cout << "This is case 2!" << endl;
            break;
        case 3:
            cout << "This is case 3!" << endl;
            break;
        case 4:
            cout << "This is case 4!" << endl;
            break;
        default:
            cout << "This is the defualt case!" << endl;
            cout << "When there is an empty, missing, or invalid input; I'm the first option!" << endl;
    }
}

int main() {
    string INPUT;
    
    cout << "Enter an int input:" << endl;
    cin >> INPUT;
    
    int input;
    
    try {
        input = stoi(INPUT);
    } catch(const invalid_argument& e) {
        cerr << "Invalid value; must be numeric!";
        
        return 1;
    }
    
    Options(input);
    
    return 0;
}