/in/foo.cc: In function 'int main()':
/in/foo.cc:23:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for (j=1;j<=51;++j)
  ^~~
/in/foo.cc:25:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   n=n-f[j];
   ^