#include using namespace std; int main() { char op; double num1, num2, result; cout << "請輸入運算符 (+, -, *, /): "; cin >> op; cout << "請輸入兩個數(shù)字: "; cin >> num1 >> num2; switch(op) { case '+': result = num1 + num2; break; case '-': result = num1 - num2; break; case '*': result = num1 * num2; break; case '/': result = num1 / num2; break; default: cout << "無效的運算符"; return 0; } cout << "運算結(jié)果為: " << result; return 0; }