C Exercises: Add two numbers

Last update on August 01 2025 13:02:01 (UTC/GMT +8 hours)

4. Add Two Numbers with Pointers

Write a program in C to add two numbers using pointers.

Visual Presentation:

C Exercises: Pictorial: Add two numbers.

Sample Solution:

C Code:

#include <stdio.h>

int main() {
    int fno, sno, *ptr, *qtr, sum;  // Declare integer variables fno, sno, sum, and integer pointers ptr, qtr

    printf("\n\n Pointer : Add two numbers :\n");
    printf("--------------------------------\n");

    printf(" Input the first number : ");
    scanf("%d", &fno);  // Read the first number from the user

    printf(" Input the second number : ");
    scanf("%d", &sno);  // Read the second number from the user

    ptr = &fno;  // Assign the address of fno to the pointer ptr
    qtr = &sno;  // Assign the address of sno to the pointer qtr

    sum = *ptr + *qtr;  // Dereference ptr and qtr to get the values and calculate their sum

    printf(" The sum of the entered numbers is : %d\n\n", sum);  // Print the sum of the entered numbers

    return 0;
}

Sample Output:

 Pointer : Add two numbers :                                                                                  
--------------------------------                                                                              
 Input the first number : 5                                                                                   
 Input the second  number : 6                                                                                 
 The sum of the entered numbers is : 11

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to add two numbers using pointers and then subtract them using the same pointer technique.
Write a C program to input two integers, add them using pointers, and then multiply the sum by a constant factor before printing.
Write a C program to perform addition of two numbers using pointer arithmetic and then store the result in a pointer variable.
Write a C program to implement addition via pointers and then update one of the original variables with the computed sum.

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