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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Beginner
Feb 13, 2002

Swapping a Temporary Variable

 
swap(int & a, int & b)
{
a ^= b;
b ^= a;
a ^= b;
}
The trick lies in the bitwise xor (^) operator. The compiler doesn't generate a temporary variable for this operation.
Sajid Khan
 
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