问在C++中对布尔值使用按位运算符

EN

BOOL two = 2;
BOOL one = 1;
BOOL and = two & one;   //and = 0
BOOL cand = two && one; //cand = 1

int one = 1;
int two = 2;

// bitwise xor
if (one ^ two)
{
  // executes because expression = 3 and any non-zero integer evaluates to true
}

// logical xor; more correctly would be coded as
//   if (bool(one) != bool(two))
// but spelled out to be explicit in the context of the problem
if ((one && !two) || (!one && two))
{
  // does not execute b/c expression = ((true && false) || (false && true))
  // which evaluates to false
}

bool result = true;
result = result && a() && b();
// will not call a() if result false, will not call b() if result or a() false

bool result = true;
result &= (a() & b());
// a() and b() both will be called, but not necessarily in that order in an
// optimizing compiler

a != b