C Exercises: Show the basic declaration of pointer

Last update on March 19 2025 12:41:09 (UTC/GMT +8 hours)

1. Basic Pointer Declaration

Write a program in C to show the basic declaration of a pointer.

Visual Presentation:

Sample Solution:

C Code:

#include <stdio.h>

int main(void)
{
    int m = 10, n, o;
    int *z = &m; // Declaring an integer pointer z and assigning the address of m to it

    // Printing basic information about pointers and variables
    printf("\n\n Pointer : Show the basic declaration of pointer :\n");
    printf("-------------------------------------------------------\n");
    printf(" Here is m=10, n and o are two integer variable and *z is an integer");
    printf("\n\n z stores the address of m  = %p\n", z); // Printing the address stored in z using %p
    printf("\n *z stores the value of m = %i\n", *z); // Printing the value pointed to by z using *z
    printf("\n &m is the address of m = %p\n", &m); // Printing the address of m using &m
    printf("\n &n stores the address of n = %p\n", &n); // Printing the address of n using &n
    printf("\n &o  stores the address of o = %p\n", &o); // Printing the address of o using &o
    printf("\n &z stores the address of z = %p\n\n", &z); // Printing the address of z using &z
}

Sample Output:

 Pointer : Show the basic declaration of pointer :                                                            
-------------------------------------------------------                                                       
 Here is m=10, n and o are two integer variable and *z is an integer                                          
                                                                                                              
 z stores the address of m  = 0x7ffd763082b4                                                                  
                                                                                                              
 *z stores the value of m = 10                                                                                
                                                                                                              
 &m is the address of m = 0x7ffd763082b4                                                                      
                                                                                                              
 &n stores the address of n = 0x7ffd763082b8                                                                  
                                                                                                              
 &o  stores the address of o = 0x7ffd763082bc                                                                 
                                                                                                              
 &z stores the address of z = 0x7ffd763082c0   

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C program to declare multiple pointers of different types (int, float, char) and print their addresses.
• Write a C program to declare a pointer, assign it the address of a variable, and then change the variable’s value using the pointer.
• Write a C program to demonstrate pointer declaration by assigning addresses of several variables and printing both the addresses and values using dereferencing.
• Write a C program to declare a pointer, print its initial garbage value, assign it a valid address, and then display both the address and the stored value.

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