[Kalcor]

The keys are a set of bits. Multiple keys/buttons can be pressed at the same time. So rather than using == or - you should use bitwise &.

pawn Код:

if(keys == KEY_JUMP) { ..

That detects if only the jump key is pressed and no other keys. For example, that condition would be false if the player pressed both KEY_SPRINT and KEY_JUMP at the same time.

pawn Код:

if(keys & KEY_JUMP) { ..

That detects if the KEY_JUMP key is pressed in combination with any other key.

pawn Код:

IsKeyJustDown(key, newkeys, oldkeys)
{
    if((newkeys & key) && !(oldkeys & key)) return 1;
    return 0;
}