reducing integers by a specific percentage

[dspain]

hello all im developing a text base MUD and have recently implemented a type of spell that puts a shield on a target and as long as this shield is on the target any damage they take is reduced by 5%.

example:

if( cptr->shield > 0)
{
dmgmod = (dmg * .05);
dmg -= dmgmod;
}

problem im having is it only reduces dmg by 5% if dmg > 100.

can someone point me into the direction of a basic routine where i can avoid this?

[Bazzy]

if dmg and dmgmod are integers, the result will be truncated

[dspain]

well i tried it several ways even:

INT dmg;
FLOAT dmgmod;

dmg = arnrnd(1,6);
shocst("DMG:","Value Of Damage Is %d".,dmg);

dmgmod = (dmg * .05);
shocst("DMGMOD:","Amount To Reduce By Is: %f",dmgmod);

dmg-=(INT)dmgmod;
shocst("NEW VALUE","DMG Is Now %d",dmg);

anyh elp would be greatly appreciated and thanks for the reply.

[filipe]

Assuming INT is a typedef for int and FLOAT for float, you're still truncating the result because dmg is an int and you're casting dmgmod to be read as an int too.

[dspain]

yeah the dev kit im using using those typedefs.

so in youre experience what way would you reccomend going about reducing dmg by 5%.

from the database dmg=arnrnd(mindam,maxdam); mindam and maxdam are both SHORT integers ranging from 1 - 9999.

[dspain]

ok after ding some playing i came up with:

double damage = 15;
float dmgmod = (damage * .05);

damage = (damage - dmgmod);

outdmg = (INT)damage;

damage is 15.0000
dmgmod is 14.7500
outdmg becomes 14

seems to work for the short haul we'll see in later routines.

so in my game code i go:

if(cptr->shield) dmg = (arnrnd( mindam , maxdam) - dmgmod );
else dmg = arnrnd(mindam , maxdam);