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C Program to Calculate Sum & Average of an Array

C Program to Calculate Sum & Average of an Array

This C Program calculates the sum & average of an array. It declares an array and then add the array elements and finds the average of the array.

/*

C program to read N integers into an array A and

- Find the sum of negative numbers
- Find the sum of positive numbers
- Find the average of all numbers
- Display the results with suitable headings

*/

    #include  <stdio.h>

    #define maxsize 10
     

    void main()

    {

        int array[maxsize];

        int j, num, negative_sum = 0, positive_sum = 0;

        float total = 0.0, average;

     

        printf ("Enter the value of N \n");

        scanf("%d", &num);

        printf("Enter %d numbers (-ve, +ve and zero) \n", num);

        for (j = 0; j < num; j++)

        {

            scanf("%d", &array[j]);

        }

        printf("Input array elements \n");

        for (j = 0; j < num; j++)

        {

            printf("%+3d\n", array[j]);

        }

        /*  Summation starts */

        for (j = 0; j < num; j++)

        {

            if (array[j] < 0)

            {

                negative_sum = negative_sum + array[j];

            }

            else if (array[j] > 0)

            {

                positive_sum = positive_sum + array[j];

            }

            else if (array[j] == 0)

            {

                ;

            }

            total = total + array[j] ;

        }

        average = total / num;

        printf("\n Sum of all negative numbers =  %d\n", negative_sum);

        printf("Sum of all positive numbers =  %d\n", positive_sum);

        printf("\n Average of all input numbers =  %.2f\n", average);

    }