Swap ()

[andrew.smith.cpp]

Hello All
what is the right way to swap two values without using Temp (Or
Third variable).
1.) to use "^" operator
2.) to use this

a=a+b;
b=a-b;
a=a-b;


Which is the right Way ?????

 

[Rolf Magnus]

Hello All
what is the right way to swap two values without using Temp (Or
Third variable).

std::swap(a, b);

 

[red floyd]

Hello All
what is the right way to swap two values without using Temp (Or
Third variable).
1.) to use "^" operator
2.) to use this

a=a+b;
b=a-b;
a=a-b;


Which is the right Way ?????

3. None of the above.

Consider:


void swap(int& a, int&b)
{
a=a+b;
b=a-b;
a=a-b;
}

int main()
{
int x = 7;
swap(x, x);
}

 

[James Kanze]

what is the right way to swap two values without using Temp

There isn't one.