/in/foo.cc: In function 'bool isnotbalance(int, int)':
/in/foo.cc:16:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
  else
  ^~~~
/in/foo.cc:22:10: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else'
          surplus= (300 - payment + surplus) % 100;
          ^~~~~~~