C Programming Slip 12

Slip12

Q1. Write a C program to calculate sum of digits of a given input number.[15 Marks]

#include <stdio.h>

int main()

{

    int num, sum=0;

    /* Input a number from user */

    printf("Enter any number to find sum of its digit: ");

    scanf("%d", &num);

    /* Repeat till num becomes 0 */

    while(num!=0)

    {

        /* Find last digit of num and add to sum */

        sum += num % 10;

        /* Remove last digit from num */

        num = num / 10;

    }

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

    return 0;

}

Q2. Accept two numbers from user and write a menu driven program to perform

 the following operations [25 Marks]

1. swap the values of two variables

2. calculate arithmetic mean and harmonic mean of two numbers

#include<stdio.h>

void main()

{

    int n1,n2,t,choice;

   

         float arithmetic_mean,harmonic_mean;

    printf("\n Enter the radius of circle:- ");

    scanf("%d%d",&n1,&n2);

    printf("\n Please make a choice from the following :");

    printf("\n \n Options:\t \t \t \t"); 

    printf("Actions:");

    printf("\n \n 1. SWap :");

   

    printf("\n \n 2. MEAN ");

       

    scanf("%d",&choice);

    switch(choice)

    {

    case 1:

                   t=n1;

                   n1=n2;

                   n2=t;

        printf("\n swap=%d %d \n \n",n1,n2);

    break;

   

   

    case 2:

       

   

     arithmetic_mean = (n1+n2) /2;

    harmonic_mean = (n1*n2) / (n1+n2);

   printf("arithmetic mean = %f and harmonic mean = %f",arithmetic_mean,harmonic_mean);

    break;

    default:

    printf("\n You haven made invalid choice \n \n");

    }

} // End of the code