C++学习(4)

 1 //设计一个简单的动态数组类
 2 #include<iostream.h>
 3 #include<stdlib.h>
 4 class Array{
 5     private:
 6         double *arr;
 7         int size;
 8     public:
 9         Array(int sz=100);
10         ~Array();
11 };
12 
13 Array::Array(int sz){
14     if(sz<=0){
15         cout<<"参数出错"<<endl;
16         exit(0);
17     }
18     size=sz;
19     arr=new double[size];
20 }
21 
22 Array::~Array(){
23     delete []arr;
24 }
25 
26 int main(){
27     Array a(10);
28     return 0;
29 }