View Compilation Error

0_0_29307704_31234.cpp: In function 'double SUM(int)':
0_0_29307704_31234.cpp:8:2: error: 'nbsp' was not declared in this scope
     if(x == 1) return 1;
  ^
0_0_29307704_31234.cpp:9:15: error: 'else' without a previous 'if'
     else
               ^
0_0_29307704_31234.cpp: In function 'int main()':
0_0_29307704_31234.cpp:27:2: error: 'nbsp' was not declared in this scope
     int m, n;
  ^