C++ about dynamic application array

In C++,

One, allocate a dynamic array for it:

Format: type name * pointer variable name = new type name [number of elements];

(The number of elements can be a variable)

eg:

int  i=5

int *p=new int[i];

 

two. Release the array for it: (When the number of elements in the declared array is dynamic, after the end of use, the space needs to be released)

Format: delete[] pointer variable name

 

Three, example: use NEW to apply for a dynamic array

#include<iostream.h>
int main()
{
	int num=0;
	cout<<"请输入数组的个数"<<endl;
	cin>>num;
	cout<<"请依次输入"<<num<<"个整数"<<endl;
	int*pSz=new int[num];
	for(int i=0;i<num;i++)
		cin>>pSz[i];
	for(i=0;i<num;i++)
		cout<<"第"<<i<<"个数为"<<pSz[i]<<endl;
	delete[] pSz;
	return 0;

}

The result is as follows