The C standard doesn't precisely define which type of right shift should be used.
For unsigned data, right shift must be logical.
For signed data, almost all machine\compiler use arithmetic.
1<<2+3<<4 = (1<<(2+3))<<4
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The C standard doesn't precisely define which type of right shift should be used.
For unsigned data, right shift must be logical.
For signed data, almost all machine\compiler use arithmetic.
1<<2+3<<4 = (1<<(2+3))<<4
转载于:https://www.cnblogs.com/KennyRom/p/6426558.html