In C language:

Develop a function that takes an array of integers and its size as two parameters and does the following:

For elements of the array with odd indices, the function should reverse their sign (e.g., if the element was 37, it becomes -37; if the element of the array was -5, it becomes 5). For elements with even indices, the function sets them to zero.

I was thinking along the lines of:

int i;

for ( i = 0; arr[i] != '\0'; i++)

{

if (arr[i] % 2 == 0) {

}

if(arr[i] % 2 != 0)

{

}

}