/in/foo.cc: In function 'int main()':
/in/foo.cc:51:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=1;i<=5;i++)
  ^~~
/in/foo.cc:59:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for(int i=1;i<=5;i++)
   ^~~
/in/foo.cc:62:15: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
      if(a[i][j]!=0)
         ~~~~~~^
/in/foo.cc:60:18: note: within this loop
     for(int j=1;j<=5;j++)
                 ~^~~
/in/foo.cc:54:12: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
   if(a[i][j]!=0)
      ~~~~~~^
/in/foo.cc:52:16: note: within this loop
   for(int j=1;j<=5;j++)
               ~^~~
/in/foo.cc:45:16: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
       if(a[i][j]!=0&&a[i][j+1]==0)
          ~~~~~~^
/in/foo.cc:43:17: note: within this loop
    for(int j=1;j<=5;j++)
                ~^~~
/in/foo.cc:34:12: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
   if(a[i][j]!=0)
      ~~~~~~^
/in/foo.cc:32:16: note: within this loop
   for(int j=1;j<=5;j++)
               ~^~~
/in/foo.cc:28:20: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations]
      b[i][j]=a[i][j];
              ~~~~~~^
/in/foo.cc:25:16: note: within this loop
   for(int j=1;j<=5;j++)
               ~^~~
cc1plus: warning: iteration 3 invokes undefined behavior [-Waggressive-loop-optimizations]
/in/foo.cc:42:15: note: within this loop
  for(int i=1;i<=5;i++)
              ~^~~