/in/foo.cc: In function 'int main()':
/in/foo.cc:22:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for ( j = 1; j <= n-1; ++j) 
     ^~~
/in/foo.cc:23:28: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    cout << a[i][j] << ' '; cout << a[i][n] << endl; }
                            ^~~~