Sum the odd numbers

#include <stdio.h>
int main() {
    int a, num[5],sum=0;
    printf("input the first number:");
    scanf("%d", &num[0]);
    printf("input the second number:");
    scanf("%d", &num[1]);
    printf("input the third number:");
    scanf("%d", &num[2]);
    printf("input the fourth number:");
    scanf("%d", &num[3]);
    printf("input the fifth number:");
    scanf("%d", &num[4]);
    for(a = 0; a<5; a++) {
        if((num[a]%2) != a)
        {
           sum += num[a];
        }
    }
    printf("Sum of all odd values: %d", sum);
    return 0;
}