Question

I’m tasked with changing a C program to x86 asm, and this line is confusing me:

int x; arr[100]

Full program:

int max = 100;
int val = 0x7a;
int x, arr[100]; /*I have a feeling that it is in fact a typo, and my compiler was just being nice*/
main(){
  x = 1;/*I just got an email saying this was an error*/
  for (x = 1; x <= max; x++){
    arr[x] = val;
   }
}

I think it means an array, but I’m not sure.

Answer 1

It is an array of int. Before C99 in certain circumstances the type could be omitted in a declaration and then int was assumed. (Note that you are missing a ; after the declaration of your array in your example).

For example:

const x = 10;    // valid in C89, not in C99
auto y = 10;     // valid in C89, not in C99