49. Print Sum of Even Numbers

#include <stdio.h>

int sum_even_numbers(int *ptr, int n) {
int sum=0;

while(n>0)
{
    if(!((*ptr)&1))
    {
        sum += (*ptr);
    }
    ptr++;
    n--;
}
return sum;
}


int main() {
    int n;
    scanf("%d", &n);

    int arr[100];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    int result = sum_even_numbers(arr, n);

    printf("Sum = %d", result);

    return 0;
}

check if even or odd
(num&1==0) .... it is odd else even