函数重载

#include<iostream>
using namespace std;
int max(int a,int b)
{
	if (a > b)
		return a;
	else
		return b;
}
int max(int a, int b, int c)
{
	int max;
	max = a > b ? a : b;
	max = max > c ? max : b;
	return max;
}
double max(double a, double b)
{
	if (a < b)
		return b;
	else return a;
}
double max(double a, double b, double c)
{
	double max;
	max = a > b ? a : b;
	max = max > c ? max : b;
	return max;
}
int main()
{
	cout << "input two different interge num,output bigger one:" << endl;
		int x, y;
		cin >> x >> y;
		cout << max(x, y) << endl;
		cout << "input three different interge num,output bigger one:" << endl;
		int z;
		cin >> x >> y>>z;
		cout << max(x, y,z) << endl;
		cout << "input two different double num,output bigger one:" << endl;
		double  x2, y2;
		cin >> x2 >> y2;
		cout << max(x2, y2) << endl;
		cout << "input three different double num,output bigger one:" << endl;
		double z2;
		cin >> x2 >> y2>>z2;
		cout << max(x2, y2,z2) << endl;
		}