program/simple.cpp at main · Mdkhubaib861/program · GitHub

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#include <iostream>
#include <string>
#include <sstream>

using namespace std;

int main() {
    double num1, num2;
    char op;

    cout << "Enter an expression (e.g., 3 + 5): ";
    cin >> num1 >> op >> num2;


    switch(op) {
        case '+':
            cout << "Result: " << num1 + num2 << endl;
            break;
        case '-':
            cout << "Result: " << num1 - num2 << endl;
            break;
        case '*':
            cout << "Result: " << num1 * num2 << endl;
            break;
        case '/':
            if (num2 != 0) {
                cout << "Result: " << num1 / num2 << endl;
            } else {
                cout << "Error: Division by zero is not allowed." << endl;
            }
            break;
        default:
            cout << "Error: Invalid operator." << endl;
    }

    return 0;
}