View Compilation Error

90460_0_22190.cpp:4:20: stdafx.h: No such file or directory
90460_0_22190.cpp: In function `int main()':
90460_0_22190.cpp:12: error: `abs' undeclared (first use this function)
90460_0_22190.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)