Assignment 1 : 

Practice Program:

Q. 1 : Write a menu driven C program to perform the following operation on an integer array:
                 a) Display the sum of elements at even subscript position of array 
                 b) Display the sum of elements at odd subscript position of array

Answer :


#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
    int arr[20], i, n, even_sum = 0, odd_sum = 0;
    char choice;

    printf("***** Menu ***** \n");
    printf("Which operation to be perform \n");
    printf("a) Display the sum of elements at even subscript position of array. !! press small a\n");
    printf("b) Display the sum of elements at odd subscript position of array. !! press small b\n");

    printf("Enter your choice a or b for that task : \n");
    scanf("%c", &choice);

    printf("Enter the size of Array : ");
    scanf("%d", &n);

    printf("Enter the array element : \n");
    for (i = 0; i < n; i++)
    {
        printf("Enter the value of index[%d] : ", i);
        scanf("%d", &arr[i]);
    }

    switch (choice)
    {
    case 'a':
        for (i = 1; i < n; i++)
        {
            if (i % 2 == 0)
            {
                even_sum += arr[i];
            }
        }
        printf("The sum of even subscript position of array = %d \n", even_sum);
        break;
    case 'b':
        for (i = 1; i < n; i++)
        {

            if (i % 2 != 0)
            {
                odd_sum += arr[i];
            }
        }
        printf("The sum of odd subscript position of array = %d \n", odd_sum);
        break;
    default:
        printf("Wrong Input !!\n");
    }

    getch();
    return 0;
}
*****************************************************************************