foo.c: In function 'hah':
foo.c:6:16: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    6 |         while (c = a % b)
      |                ^
foo.c:11:13: warning: unused variable 'e' [-Wunused-variable]
   11 |         int e = d / b;
      |             ^
foo.c: In function 'main':
foo.c:22:16: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   22 |         while (j =i % f)
      |                ^

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