exam0-1.cpp

数据结构c++-书的一些源代码

#include <iostream.h> 

int Example1(int a, int b, int c)							//值参数
{
	int x, y, z;
	x = a; y = b; z = c;
	a = 2 * a; b = 2 * b; c = 2 * c;  //函数返回后对应实际参数的值不变
	return (x + y + z)/3;
}
	  
int Example2(const int a, const int b, const int c)		//常值参数
{
	return (a + b + c)/3;				//不允许改变参数a, b, c的值
}

int Example3(const int& a, const int& b, const int& c)	//常值引用参数
{
	return (a + b + c)/3;			//不允许改变常值引用参数a, b, c的值
}

int Example4(int& a, int& b, int& c)						//引用参数
{
	int x, y, z;
	x = a; y = b; z = c;
	a = 2 * a; b = 2 * b; c = 2 * c;  //函数返回后对应实际参数的值改变
	return (x + y + z)/3;
}

void main()
{
	int a =3, b = 4, c = 5;

	cout << "Example1(a, b, c) = " << Example1(a, b, c) << endl;
	cout << "a, b, c = " << a << "," << b << "," << c << endl;
	cout << "Example2(a, b, c) = " << Example2(a, b, c) << endl;
	cout << "a, b, c = " << a << "," << b << "," << c << endl;
	cout << "Example3(a, b, c) = " << Example3(a, b, c) << endl;
	cout << "a, b, c = " << a << "," << b << "," << c << endl;
	cout << "Example4(a, b, c) = " << Example4(a, b, c) << endl;
	cout << "a, b, c = " << a << "," << b << "," << c << endl;
}