foo.cc: In function 'int main()':
foo.cc:27:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(j=1;j<=n;j++)
  ^~~
foo.cc:30:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   cin>>x1>>x2>>y1>>y2;
   ^~~
foo.cc:33:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(j=1;j<=n;j++) 
  ^~~
foo.cc:34:7: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  x1=i;y1=j;
       ^~

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