Write a C program to perform Array of pointers

A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before using it to store any variable address.

The general form of a pointer variable declaration is −

• type *var-name;

Here, type is the pointer’s base type; it must be a valid C data type and var-name is the name of the pointer variable.

The asterisk * used to declare a pointer is the same asterisk used for multiplication. However, in this statement the asterisk is being used to designate a variable as a pointer.

The unary or monadic operator & gives the “address of a variable’”.

The indirection or dereference operator * gives the “contents of an object pointed to by a pointer”.

Below is the source code for C program to perform Array of pointers which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/*  C program to perform 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("\tValue of \ta: %d \tb: %d \tc: %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("\n\tAfter adding 10\n\n");
    printf("\tValue of \ta: %d \tb: %d \tc: %d\n",*ptr[0],*ptr[1],*ptr[2]);

    return 0;
}

Output : : 

/*  C program to perform Array of pointers  */


        Value of        a: 100  b: 200  c: 300

        After adding 10

        Value of        a: 110  b: 210  c: 310

Process returned 0

Above is the source code for C program to perform Array of pointers which is successfully compiled and run on Windows System.The Output of the program is shown above .