C Program to Find the sum of negative and positive numbers

  /*

     * C program to read N integers into an array A and

     * a) Find the sum of negative numbers

     * b) Find the sum of positive numbers

     * c) Find the average of all numbers

     * Display the results with suitable headings

     */

    #include  <stdio.h>

    #define MAXSIZE 10

     

    void main()

    {

        int array[MAXSIZE];

        int i, 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 (i = 0; i < num; i++)

        {

            scanf("%d", &array[i]);

        }

        printf("Input array elements \n");

        for (i = 0; i < num; i++)

        {

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

        }

        /*  Summation starts */

        for (i = 0; i < num; i++)

        {

            if (array[i] < 0)

            {

                negative_sum = negative_sum + array[i];

            }

            else if (array[i] > 0)

            {

                positive_sum = positive_sum + array[i];

            }

            else if (array[i] == 0)

            {

                ;

            }

            total = total + array[i] ;

        }

        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);

    }


output :-

Enter the value of N
10
Enter 10 numbers (-ve, +ve and zero)
-8
9
-100
-80
90
45
-23
-1
0
16
Input array elements
 -8
 +9
-100
-80
+90
+45
-23
 -1
 +0
+16

Sum of all negative numbers =  -212
Sum of all positive numbers =  160

Average of all input numbers =  -5.20