Re: Choose between x++ or x--?
Diego Martins wrote:
On Oct 4, 1:17 am, Rolf Magnus <ramag...@t-online.de> wrote:
desktop wrote:
I have a function that increments x:
void fun(int arg) {
int x = 10;
x++;
}
is there someway to change 'x++' to 'x--' based on the argument
'arg'.
Based on it how? If arg is always either -1 or +1, you could of
course simply do:
void fun(int arg)
{
int x = 10;
x+=arg;
}
what about a pointer to function (to the incrementor or decrementor
function)
see the ugly code below (coded on the fly and not tested)
void inc(int &x);
void dec(int &x);
void lalala(int arg)
{
void (*func)(int &);
if( arg == condition for increment ) {
func = &inc;
} else {
func = &dec;
}
while( whatever ) {
...
func(x);
...
}
}
Really? *That's* going to be /faster/ than a single if?
V
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