I got this error when make the c file. How can I solve it?

Question

How can I solve this problem?

error: expected an expression

 for (int i = 0; i < n; i++){
     ^

Function that I try to implement:

void initRacks(struct rack_t *racks, int n) {
  for (int i = 0; i < n; i++){
    racks[i].widthA = i + 2.5;
    racks[i].widthB = i + 1.5;
  }
}

There's nothing obviously wrong with the code you've shared (assuming modern C). There may be a syntax error somewhere _before_ that code. — Brian61354270, Mar 14 '23 at 15:47
@Brian61354270 The code won't work if compiled under C standard below C99 — Eugene Sh., Mar 14 '23 at 15:48
If it is the problem, the easiest would be to move the definition of `i` before the for loop. — Eugene Sh., Mar 14 '23 at 15:50
@EugeneSh. moving i out of loop worked. But why can't I use it in the loop construct? — SilverShroud, Mar 14 '23 at 15:51
Read the previous comments. This construct was introduced in C99. Your compiler might be implementing an older standard, or configured to comply with older standard. — Eugene Sh., Mar 14 '23 at 15:56

score 1 · Accepted Answer · answered Mar 14 '23 at 16:12

1

It depends on which version your compiler is. Declaring the int i; above the for loop will solve the error.

answered Mar 14 '23 at 16:12

HenkJanSnot

1 Answers1