Write a void function using two type int call-by-reference parameters that swaps the values in the arguments. Be sure to include testable pre and post conditions.
What will be an ideal response?
```
//precondition: arguments arg1, arg2 are initialized
//postcondition: arg1post == arg2pre && arg2post == arg1pre
void swap( int & lhs, int & rhs)
{
int temp = lhs;
lhs = rhs;
rhs = tmp;
}
```
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