Playground/2-0-2-4.cpp at main · LANEING-AVIATION/Playground · GitHub

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#include <iostream>
#include <iomanip>

using namespace std;

int main() {
	int data1, data2;
	char op;
	cin >> data1 >> data2 >> op;

	switch (op) {
		case '+':
			cout << data1 + data2 << endl;
			break;
		case '-':
			cout << data1 - data2 << endl;
			break;
		case '*':
			cout << data1 *data2 << endl;
			break;
		case '/':
			if (data2 == 0) {
				cout << "error" << endl;
			} else {
				double result = static_cast<double>(data1) / data2;
				if (data1 % data2 == 0) {
					cout << fixed << setprecision(0) << result << endl;
				} else {
					cout << fixed << setprecision(2) << result << endl;
				}

			}
			break;
		default:
			cout << "Invalid operator" << endl;
			break;
	}

	return 0;
}