C Programming slip 29

C Programming BCA Practical Slips Solution
Slip 29

Q1. Write a C program to calculate factorial of a number using user defined function.

[15 Marks]

#include <stdio.h>

int main()

{    int n, i;

    unsigned long long factorial = 1;

    printf("Enter an integer: ");

    scanf("%d",&n);

    // show error if the user enters a negative integer

           for(i=1; i<=n; ++i)

        {

            factorial *= i;              // factorial = factorial*i;

        }

        printf("Factorial of %d = %llu", n, factorial);

        return 0;

}

Q2. Write a program, which accepts a number n and displays each digit separated by tabs.

Example: 6702 Output = 6 7 0 2 [25 Marks]

#include<stdio.h>

int main()

{

      int digit, num,rem;

      printf("Enter positive integer number: ");

      scanf("%d", &num);    

     while(num>0)

         {

          rem=rem*10+num%10;

           num=num/10;

          }

      printf("\nYou have entered: ");

      while (rem > 0)

      {            digit = rem % 10;   

            printf("\t %d",digit);

            rem=rem/10;

      }

      return 0;

}