c语言100位整数变量声明

Here, we will learn how we can declare an integer variable dynamically and how to print address of declared memory block?

在这里，我们将学习如何动态声明整数变量，以及如何打印声明的内存块的地址？

In C++ programming, we can declare memory at run time for any type variable like char, int, float, integer array etc. To declare memory at run time (dynamically), we use new operator. I would recommend reading about new operator first.

在C ++编程中，我们可以在运行时为char，int，float，integer array等任何类型的变量声明内存。要在运行时(动态)声明内存，请使用new运算符。 我建议先阅读有关新运算符的信息 。

Consider the following program:

考虑以下程序：

#include <iostream>
using namespace std;
int main()
{
//integer pointer declartion
//It will contain the address of dynamically created 
//memory blocks for an integer variable 
int *ptr;
//new will create memory blocks at run time 
//for an integer variable
ptr=new int;
cout<<"Address of ptr: "<<(&ptr)<<endl;
cout<<"Address that ptr contains: "<<ptr<<endl;
//again assigning it run time
ptr=new int;
cout<<"Address of ptr: "<<(&ptr)<<endl;
cout<<"Address that ptr contains: "<<ptr<<endl;
//deallocating...
delete (ptr);
return 0;	
}

输出量 (Output)

    Address of ptr: 0x7ffebe87bb98Address that ptr contains: 0x2b31e4097c20Address of ptr: 0x7ffebe87bb98Address that ptr contains: 0x2b31e4098c50

Here we are declaring an integer pointer ptr and printing the address of ptr by using &ptr along with stored dynamically allocated memory block.

在这里，我们声明的整数指针PTR以及通过使用＆PTR与存储动态分配的存储块沿着打印PTR的地址。

After that we are declaring memory for integer again and printing the same.

之后，我们再次声明整数的内存并打印该整数。

From this example - we can understand memory blocks are allocating dynamically, each time different memory blocks are storing in the pointer ptr.

从这个例子中，我们可以理解每次将不同的存储块存储在指针ptr中时，存储块都是动态分配的。

翻译自: https://www.includehelp.com/code-snippets/cpp-declare-integer-variable-dynamically-print-the-memory-addresses.aspx

c语言100位整数变量声明