Code:
#define amerknife 1
#define bar 2
#define weapon_bazooka 3
#define c96 4
#define colt 5
#define frag_us 6
#define frag_ger 7
#define garand 8
#define riflegren_us 9
#define k98 10
#define riflegren_ger 11
#define k98_scoped 12
#define m1carbine 13
#define mg42 14
#define mp40 15
#define mp44 16
#define p38 17
#define pschreck 18
#define spade 19
#define spring 20
#define thompson 21
new Float:gWeaponKnockBack[MAX_WEAPON];
gWeaponKnockBack[mg42] = 1.0; // and more
public Action:ev_player_hurt(Handle:event,const String:name[],bool:dontBroadcast)
{
GetEventString(event,"weapon",weapon,65);
PrintToServer("%f",gWeaponKnockBack[weapon]); // how to get it?
}