calculator1.cpp

#include<iostream>
using namespace std;
int main()
{
    float n1 = 0.0F;
    float n2 = 0.0F;
    float ans = 0.0F;
    char ch = '\0'; //NULL
    cout<<"Calculator App"<<endl;
    cout<<"===================="<<endl;
    cout<<"Please enter first number: ";
    cin>>n1;
    cout<<"Please enter second number: ";
    cin>>n2;
    cout<<"choose operation +,-,*,/,%: ";
    cin>>ch;

    if (ch == '+'){
        ans = n1 + n2;
    }

    else if (ch == '-'){
        ans = n1 - n2;
    }

    else if (ch == '*'){
        ans = n1 * n2;
    }

    else if (ch == '/'){
        ans = n1 / n2;
    }

    else if (ch == '%'){
        ans = (int)n1 % (int)n2;
    }
    else {
        cout << "Invalid operation!" << endl;
        return 1; // Exit with error code
    }

    cout<<"answer = "<<ans<<endl;

    return 0;
}