View Compilation Error

0_0_33509346_27548.cpp: In function 'int main()':
0_0_33509346_27548.cpp:7:2: error: 'nbsp' was not declared in this scope
   int n,u,d,t,c;
  ^
0_0_33509346_27548.cpp:17:26: error: 'else' without a previous 'if'
      else{
                          ^
0_0_33509346_27548.cpp:23:44: error: 'else' without a previous 'if'
         else c=(n-u)/(u-d);
                                            ^