#include <stdio.h>

#include <iostream>

using std::cout;

using std::endl;

//这里的两个不同的add函数根据函数的参数个数不同，编译为目标文件后

//名字发生变化

int add(int x = 0, int y = 0)

{

	return x + y;

}

int add(int x, int y, int z)

{

	return x + y + z;

}

int main(void)

{

	int a = 3, b = 4, c = 5;

	cout << "add(a) = " << add(a) << endl;

	cout << "add(a, b) = " << add(a, b) << endl;

	cout << "add(a, b, c) = " << add(a, b, c) << endl;

	return 0;

}