4.1.3嵌套if语句

#include <iostream>
using namespace std;

int main4_1()
{
	int sore = 0;
	cout << "shuru:" << endl;
	cin >> sore;
	if (sore >= 600)
	{
		cout << "neng" << endl;
		if (sore > 700)
		{
			cout << "aaa" << endl;
		}
	}
	else if (sore > 500)
	{
		cout << "ffff" << endl;
	}

	else
	{
		cout << "buneng" << endl;
	}

	system("pause");
	return 0;
}

#include <iostream>
using namespace std;

int main411()
{
	int sore = 0;
	cout << "shuru:" << endl;
	cin >> sore;
	if (sore >= 600)
	{
		cout << "neng" << endl;
	}
	else if (sore > 500)
	{
		cout << "ffff" << endl;
	}

	else
	{
		cout << "buneng" << endl;
	}

	system("pause");
	return 0;
}