View Compilation Error

28166_0_6907.cpp: In function `int main()':
28166_0_6907.cpp:57: error: `scan' undeclared (first use this function)
28166_0_6907.cpp:57: error: (Each undeclared identifier is reported only once for each function it appears in.)
28166_0_6907.cpp:83: error: `copy' undeclared (first use this function)