编辑代码

#include <iostream>
using namespace std;
int main() {
    double a(999);
    double b = 989;
    int result = a + b;
	cout << "a + b =" << result << endl;
    int result1 = a - b;
    cout << "a - b =" << result1 << endl;
    int result2 = a * b;
    cout << "a * b =" << result2 << endl;
    double result3 = a / b;
    cout << "a / b =" << result3 << endl;
	return 0;
}