View Compilation Error

0_0_24545456_3688.cpp: In function 'int main()':
0_0_24545456_3688.cpp:19:32: error: 'find' was not declared in this scope
                  int A = find(a);
                                ^
0_0_24545456_3688.cpp: At global scope:
0_0_24545456_3688.cpp:35:10: error: 'x' was not declared in this scope
 int find(x)
          ^
0_0_24545456_3688.cpp:36:1: error: expected ',' or ';' before '{' token
 {
 ^