二维数组

#include<iostream>
using namespace std;
int f(int b[][4])
{
	int i, j, s = 0;
	for (j = 0; j < 4; j++)
	{
		i = j;
		if (i > 2) i = 3 - j;
		s += b[i][j];
	}
	return 0;
}
int main()
{
	int a[4][4] = { {1,2,3,4},{5,6,7,8},{9,10,11,12},{13,14,15,16} };
	cout << f(a) << endl;
	return 0;
}
``
#include<iostream>
using namespace std;
double max(double x, double y);
int main()
{
	double x, y;
	cout << "please enter x,y:";
	cin >> x >> y;
	cout << max(x, y) << endl;
	return 0;
}
double max(double a, double b)
{
	return (a > b ? a : b);
}