pointer3.cpp

c语言教程源码

//这个程序在本书所带软盘中，文件名为POINTER3.CPP
//这个程序演示有关指针变量的输入与输出操作。

#include <iostream.h>

void main(void)
{
	int *n_ptr;		//定义一个整型指针变量n_ptr
	int num;

	float *f_ptr;	//定义一个实数型指针变量f_ptr
	float real;

	char *ch_ptr;	//定义一个字符型指针变量ch_ptr
	char ch;

	n_ptr = &num;	//让n_ptrz指向num
	f_ptr = &real;	//让f_ptr指向real
	ch_ptr = &ch;	//让ch_ptr指向ch

	cout << "请输入一个整数:";
	cin >> *n_ptr;
	cout << "请输入一个实数:";
	cin >> *f_ptr;
	cout << "请输入一个字符:";
	cin >> *ch_ptr;
	cout << endl;
	cout << "整数num = " << *n_ptr << endl;
	cout << "整数*n_ptr = " << num << endl;
	cout << endl;
	cout << "实数real = " << *f_ptr << endl;
	cout << "实数*f_ptr = " << real << endl;
	cout << endl;
	cout << "字符ch = " << *ch_ptr << endl;
	cout << "字符*ch_ptr = " << ch << endl;
}

/*这个程序运行后将显示如下输出结果：
请输入一个整数:100
请输入一个实数:3.1415
请输入字符一个字符:c

整数num = 100
整数*n_ptr = 100

实数real = 3.1415
实数*f_ptr = 3.1415

字符ch = c
字符*ch_ptr = c
*/