Write a program to find the sum of digits of a 5 digit number using command line argument.

Dr. A.P.J. Abdul Kalam Technical University, Lucknow

KCS151 / KCS251 Programming for Problem Solving - Using C Language

Lab Exercises

45. Write a program to find the sum of digits of a 5 digit number using command line argument.

/*

 File: Prgrm45.c

 Author: Aditya Saini

 Date: Jan 20, 2021

 Description: Program to find the sum of digits of a 5 digit number using command line argument.

*/

#include <stdio.h>

#include <stdlib.h>

int main (int argc, char *argv[])

{

     int num, sum;

     if (argc == 1)

          printf ("Error! No command line argument found.");

     else

     {

          num = atoi (argv[1]);

          //Calculate sum of digits

          sum = 0;

          while (num != 0)

          {

               sum = sum + num % 10;

               num = num / 10;

          }

          //Print result

          printf ("Sum of digits: %d", sum);

     }

     return 0;

};

Output

C:\Users\digita>"G:\KCS151 or KCS251\Prgrm45.exe" 12345

Sum of digits: 15