View Compilation Error

0_0_18438086_16513.cpp: In function 'int main()':
0_0_18438086_16513.cpp:37:19: error: 'a' was not declared in this scope
 memset(P,0,sizeof(a));
                   ^
0_0_18438086_16513.cpp:38:19: error: 'b' was not declared in this scope
 memset(T,0,sizeof(b));
                   ^
0_0_18438086_16513.cpp:39:19: error: 'c' was not declared in this scope
 memset(f,0,sizeof(c));
                   ^
0_0_18438086_16513.cpp:46:36: error: invalid use of void expression
 printf("Case #%d: %d %d\n",i,find());
                                    ^