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C program to demonstrate example of array of pointers

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mahmoud2506
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2022-05-04
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C program to demonstrate example of array of pointers

In this program, we have to declare, assign and access array of pointers in C.

As we know that, pointers are the special type of variables that are used to store the address of another variable. And array is the group of similar type of variables (using single name for all variables), that takes contiguous memory locations.

"Array of pointes" is an array of the pointer variables. Here, in this C program we are declaring an array of integer pointer int *ptr[3]; it will store the address of integer variables.

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mahmoud2506
2022-05-04
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C program for array of pointers

/*C program to demonstrate example of array of pointers.*/
#include <stdio.h>
 
int main()
{
    /*declare same type of variables*/
    int a,b,c;
     
    /*we can create an integer pointer array to 
  store the address of these integer variables*/
    int *ptr[3];
     
    /*assign the address of all integer variables to ptr*/
    ptr[0]= &a;
    ptr[1]= &b;
    ptr[2]= &c;
     
    /*assign the values to a,b,c*/
    a=100;
    b=200;
    c=300;
     
    /*print values using pointer variable*/
    printf("value of a: %d, b: %d, c: %d\n",*ptr[0],*ptr[1],*ptr[2]);
 
    /*add 10 to all values using pointer*/
    *ptr[0] +=10;
    *ptr[1] +=10;
    *ptr[2] +=10;
    printf("After adding 10\nvalue of a: %d, b: %d, c: %d\n",*ptr[0],*ptr[1],*ptr[2]);
 
    return 0;
}

Output

    value of a: 100, b: 200, c: 300
    After adding 10
    value of a: 110, b: 210, c: 310

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