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C Program to Calculate Sum & Average of an Array

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09-29-2016, 04:10 PM #1
Mitu Offline FFU SENIOR FFU SENIOR
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Code:
/*
* 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);
}

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