Null Pointer Example in C++

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The program assigns a null value to an integer pointer ptr and prints the value of ptr using the cout statement. Here's what the program does step by step:

• Declare an integer pointer ptr.
• Assign a null value to ptr using the NULL macro.
• Print the value of ptr using the cout statement.

Source Code

#include<iostream>
using namespace std;
int main()
{
  int *ptr = NULL;
  cout<<"The value of ptr is "<<ptr;
  return 0;
}

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Output

The value of ptr is 0

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Program List

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• Hello World In C++
• Why we using namespace std in C++
• Getting Inputs in C++
• std::string class in C++
• if Statement in C++
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• Arrays in C++
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• Function In C++
• Function Overloading In C++
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• Template In C++
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• What is Public Access Specifier in C++
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• Default Constructor in C++
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• Constructor Overloading in C++
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• Pure Virtual Function & Abstract Class in C++
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• Printing Numbers in C++
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While Loop

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For Loop

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• Armstrong number using For Loop
• Cubic Numbers using For Loop
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• Formula Examples using For Loop
• Reverse Number Pattern
• Number Patterns using For Loop
• Odd & Even Numbers using For Loop
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• Diamond Pattern Outline in C++
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• Printing Tables using For Loop
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Hybrid Inheritance

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Multilevel Inheritance

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Destructor Example

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Operator Overloading Example

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• Assignment Operator Overloading Example
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• Increment & Decrement Example
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Operator and Function Example

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• Display Values using Friend Function

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• Constructor Example in C++
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• Inline Function in C++
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