do anybody know why its wrong
#include <cstdlib>
#include <iostream>
#include <math.h>
using namespace std;

int main(int argc, char *argv[])
{
    float l, h, omega;
    double long wynik, obroty_wykonane;

    cin>> l >> h >> omega;
          obroty_wykonane=((omega/60)*sqrt(((h-(0.5*l))/450.5)));
          wynik=obroty_wykonane-floor(obroty_wykonane);
    if (wynik>0.25 && wynik<0.75) {cout << "bread"<< endl;}
    else {cout << "butter"<< endl;}
    return EXIT_SUCCESS;
}

Try it:
//--------------------
var c,l,h,w,t:real;
begin
readln(l,h,w);
h:=h/100;
l:=l/100;
w:=w/60;
if l/2>=h then  writeln('butter') else begin
h:=h-0.5*l;
t:=sqrt(abs((2*h)/9.81));
c:=t*w;
while c>1 do c:=c-1;
if ((c<0.25)or(c>0.75)) then write('butter') else write('bread'); end;
readln;
end.
//-------------


Edited by author 29.01.2011 00:37