foo.cpp: In function 'int search(int)':
foo.cpp:28:5: warning: no return statement in function returning non-void [-Wreturn-type]
     }
     ^
foo.cpp: In function 'int main()':
foo.cpp:33:28: error: 'memset' was not declared in this scope
     memset(a,true,sizeof(a));
                            ^