View Compilation Error

0_0_4745519_19331.cpp:3:20: windows.h: No such file or directory
0_0_4745519_19331.cpp: In function `int main()':
0_0_4745519_19331.cpp:9: error: `execlp' undeclared (first use this function)
0_0_4745519_19331.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)