Simple calculator making project in C++.

#include <iostream>
using namespace std;
int main() {
    int a,b,c;
    cout<<"Enter first number"<<endl;
    cin>> a ;
    cout<<"Enter second number number"<<endl;
    cin>> b;
    cout<<"Enter operator"<<endl;
    cin>> c;
    switch
            (c){
        case 0 : cout<< "The sumetion is " <<endl;
            break;
        case 1: cout<<"The multiplication is "<<endl;
            break;
        case 2 : cout<<"The subtraction is "<<endl;
            break;
        case 3: cout<<"The division is  "<<endl;
            break;
        default: cout<<"invalid input";

    }

    return 0;
}