/in/foo.c: In function 'main':
/in/foo.c:7:9: warning: zero-length gnu_printf format string [-Wformat-zero-length]
  printf("");
         ^~
/in/foo.c:13:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if(a%b==0)
    ^~
/in/foo.c:15:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
       break;
       ^~~~~
/in/foo.c:17:10: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
          if(c)
          ^~
/in/foo.c:19:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
             c=1;
             ^