View Compilation Error

0_0_33416033_20112.cpp: In function 'void Sell(const int&)':
0_0_33416033_20112.cpp:30:9: error: 'idx' was not declared in this scope
     if (idx != 0)
         ^
0_0_33416033_20112.cpp: In function 'int main()':
0_0_33416033_20112.cpp:73:28: error: too many arguments to function 'void Sell(const int&)'
             Sell(sell[i], i);
                            ^
0_0_33416033_20112.cpp:17:6: note: declared here
 void Sell(const int &x)
      ^