View Compilation Error

0_0_20669473_28032.cpp: In function 'void del_0_after_point(char*)':
0_0_20669473_28032.cpp:6:2: error: 'nbsp' was not declared in this scope
    int len = strlen(s); 
  ^
0_0_20669473_28032.cpp: In function 'int main()':
0_0_20669473_28032.cpp:16:2: error: 'nbsp' was not declared in this scope
     char a[100024],b[100024];
  ^