C :: Create Array Of Integer - Function Call In Main

I'm writing code to create an array of integer and let user input choice to display, replace, add new element, etc.I created a header file in the header file there's a function:

Code:

int display_one_element(int* array, int num_of_elements, int position) {
if(num_of_elements < position || position < 0) {
printf("Position out of bound.
");
return 1;
}
return array[position-1];
}

in main I write a function call:

Code:

display_one_element(array, *p_num_elements, position);

My code seems to work fine but there's an error message right next to my function call:
1.too many arguments provided to function like macro invocation
2.Expression result unused

I tried to move the function from header file to c source file. but other functions in the header file works fine and this doesn't work with the error message.