15-2.txt

C++完美演绎 经典算法 如 /* 头文件：my_Include.h */ #include <stdio.h> /* 展开C语言的内建函数指令 */ #define PI 3.141

/* 范例：15-2 */
#include <iostream.h>
struct data
{
  float height; float weight;
};
class animal
{
  public:
     data *hei;
     data *wei;
     animal(void)
     {
       hei = new data;  wei = new data;  // 配置内存
       cout << "animal(void) class Constructor \n";
     }
     ~animal(void)
     {
       delete hei; delete wei;  // 为C++删除内存的指令
       cout << "animal class Destructor \n";
     }
     void ShowHandLen(void)
     {
       cout << "Tiger's height = " << hei->height << "cm" \
           << "\t\tTiger's weight = " << wei->weight << "kg\n";
     }
};
void classTest(void)
{
   animal tiger; // 构建方式1,构建一个tiger对象
   cout << "size =" << sizeof(tiger) << endl;

   /* 定义一个对象指针tiger1, 将tiger的地址值设定给对象指针tiger1,tiger1将根据
      tiger的地址操作其成员并改变其内容。 */
   animal *tiger1; tiger1 = &tiger;
   tiger.hei->height = 50;	// tiger对象,设定高度初值为50
   tiger.wei->weight = 70;	// tiger对象,设定重量初值为70
   cout <<"tiger 地址="<<&tiger<<"\t\ttiger1 地址=" \
       <<&tiger1<<"\n";
   cout <<"tiger height add = "<< &tiger.hei->height \
       <<"\ttiger weight add= "<<&tiger.wei->weight<<endl;
   cout <<"tiger *hei 地址="<<&tiger.hei<<"\ttiger *wei地址=" \
       <<&tiger.wei<<endl;
   cout <<"height = "<<tiger.hei->height << "\tweight = " \
       <<tiger.wei->weight<<"\n\n";

   // tiger1按地址操作tiger的内容,将改变高度为200
   tiger1->hei->height = 200;
   // tiger1按地址操作tiger的内容,将改变重量为80
   tiger1->wei->weight = 80;

   cout <<"tiger1 height add = "<< &tiger1->hei->height \
       <<"\ttiger1 weight add= "<<&tiger1->wei->weight<<endl;
   cout <<"tiger1 *hei 地址="<<&tiger1->hei<<"\ttiger1 *wei=" \
       <<&tiger1->wei<<endl;
   tiger1->ShowHandLen();
}
//---------------------------------------------------------------------------
void main(void)
{
  classTest();
  getchar();
}
程序执行结果：
animal(void) class Constructor
size =8
tiger 地址=0065FDF4			tiger1 地址=0065FDCC
tiger height add = 00682F48   	tiger weight add= 00682F5C
tiger *hei 地址=0065FDF4  		tiger *wei地址=0065FDF8
height = 50     weight = 70

tiger1 height add = 00682F48	tiger1 weight add= 00682F5C
tiger1 *hei 地址=0065FDF4	tiger1 *wei=0065FDF8
Tiger's height = 200cm	Tiger's weight = 80kg
animal class Destructor