Knife Speed

Code:

Knife Speed 1 - 0xA64
Knife Speed 2 - 0xA68

 =(float)1 !!!!!!

By means of the Cheat Engine program I managed to find offsets which are responsible for speed of a knife (these offsets the correct 100 %, I checked them several times). How it is correct to write down now them in a code? I have made such code, but for me does not work. How it is correct to write down a code?

Code:

if(cItem.CF_KnifeSpeed)
	{
		if (pWeaponMgr  != NULL)
		{
			for(int i=0 ; i<800 ; i++)
			{
				if((*(DWORD*)((*(DWORD*)(CShell+WeaponMgr))+(4*i)) ) != NULL)
				{
						Weapon = (*(DWORD*)(pWeaponMgr + (4*i)));
						if(Weapon != NULL)
						{
								*(float*)( Weapon + (0xA64 + (4*i))) = (float)1;
								*(float*)( Weapon + (0xA68 + (4*i))) = (float)1;
	}}}}}