View Compilation Error

0_0_30204265_7134.cpp: In function 'int shuweidp(int, int, int, int, int)':
0_0_30204265_7134.cpp:25:2: error: 'x' was not declared in this scope
  x=9;
  ^
0_0_30204265_7134.cpp:28:1: error: 'x' was not declared in this scope
 x=bns[pos];
 ^
0_0_30204265_7134.cpp:29:17: error: 'x' was not declared in this scope
  for(int i=0;i<=x;i++)
                 ^