1 #include <stdio.h> 2 3 #ifdef _WIN32 4 #include <Windows.h> 5 #define getpid (int) GetCurrentProcessId 6 #else 7 #include <unistd.h> 8 #endif 9 main(void)10 int main(void) 11 { 12 printf("%d", getpid()); 13 14 return 0; 15 } 16