FX_DWORD >>4 等于0

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#include <iostream> typedef unsigned int        FX_DWORD; typedef unsigned long long  FX_UINT64; typedef unsigned int        FX_UINTPTR; int main() {     FX_DWORD i = ((FX_DWORD)(FX_UINTPTR)1) >> 4;     std::cout << i << std::endl;     std::cout << "Hello World!\n";     system("PAUSE"); }