View Compilation Error

1_549_178_27350.cpp:1:19: stdafx.h: No such file or directory
1_549_178_27350.cpp: In function `void run()':
1_549_178_27350.cpp:30: error: `w' undeclared (first use this function)
1_549_178_27350.cpp:30: error: (Each undeclared identifier is reported only once for each function it appears in.)