View Compilation Error

354500_0_27813.cpp:7:21: windows.h: No such file or directory
354500_0_27813.cpp: In function `int main()':
354500_0_27813.cpp:62: error: `_sleep' undeclared (first use this function)
354500_0_27813.cpp:62: error: (Each undeclared identifier is reported only once for each function it appears in.)