Well you should have a variable like Wequip that is set to 1 when you get the gun, to 0 when you don´t have it and to when is unnequiped, so you have a function managing this variable like
while(1)//for ever or until a break
{
switch(Wequip)//acording to Wequip
{
case 0://if its 0
// put here the commands
break;
case 1://if its 0
// put here the commands
break;
case 2://if its 0
// put here the commands
break;
}
}
if you have many weapons you can use an array like Wequip[x] where x is the number of the weapons
