View Compilation Error

50923_0_2233.cpp: In function `void theway(int)':
50923_0_2233.cpp:20: error: `max' undeclared (first use this function)
50923_0_2233.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
50923_0_2233.cpp: In function `int main()':
50923_0_2233.cpp:40: error: `max' undeclared (first use this function)