View Compilation Error

0_0_27806639_13726.cpp: In function 'int gong(int, int)':
0_0_27806639_13726.cpp:4:2: error: 'nbsp' was not declared in this scope
     int t=1, i, j;
  ^
0_0_27806639_13726.cpp: In function 'int main()':
0_0_27806639_13726.cpp:17:2: error: 'nbsp' was not declared in this scope
     int a, n, m, i, j;
  ^