C++ 计算器：实现浮点数加减乘除运算

#include "iostream"\n#include "iomanip"\n\nusing namespace std;\n\nint main() {\n float num1, num2;\n char op;\n \n while (cin >> num1 >> op >> num2) {\n if (op == '+') {\n cout << fixed << setprecision(2) << num1 + num2 << endl;\n } else if (op == '-') {\n cout << fixed << setprecision(2) << num1 - num2 << endl;\n } else if (op == '*') {\n cout << fixed << setprecision(2) << num1 * num2 << endl;\n } else if (op == '/') {\n if (num2 == 0) {\n cout << "Divide by zero." << endl;\n } else {\n cout << fixed << setprecision(2) << num1 / num2 << endl;\n } \n }\n }\n \n return 0;\n}