/in/foo.c: In function 'main':
/in/foo.c:27:17: error: 'reverse' undeclared (first use in this function); did you mean 'reversed'?
   27 |                 reverse=reverse*10+digits[i];
      |                 ^~~~~~~
      |                 reversed
/in/foo.c:27:17: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:27:43: error: 'i' undeclared (first use in this function)
   27 |                 reverse=reverse*10+digits[i];
      |                                           ^
/in/foo.c:24:13: warning: unused variable 'reversed' [-Wunused-variable]
   24 |         int reversed=0;
      |             ^~~~~~~~