Assignment9_1.c

// 1. Accept N numbers from user and return difference between summation of even elements and summation of odd elements.

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

int Difference(int Arr[],int iLength)
{
    int iCnt = 0;
    int SumEven = 0 , SumOdd = 0;
    
    for(iCnt = 0 ; iCnt < iLength ; iCnt++)
    {
        if(Arr[iCnt] % 2 ==0)
        {
            SumEven = SumEven + Arr[iCnt];
        }

        if(Arr[iCnt] % 2 != 0)
        {
            SumOdd = SumOdd + Arr[iCnt];
        }
    }
    return (SumEven - SumOdd);
}

int main()
{
    int iSize = 0 , iRet = 0, iCnt = 0;
    int *p = NULL;

    printf("Enter number of elements \n");
    scanf("%d",&iSize);

    p = (int *)malloc(iSize * sizeof(int));

    if(p==NULL)
    {
        printf("Unable to allocate memory");
        return -1;
    }

    for(iCnt = 0; iCnt < iSize ; iCnt++)
    {
        printf("Enter element :  %d\n",iCnt+1);
        scanf("%d",&p[iCnt]);
    }

    iRet = Difference(p , iSize);
    printf("Result is : %d\n",iRet);

    free(p);

    return 0;
}