On 24 Maj, 20:28, " " <t...@g...SKASUJ-TO.pl> wrote:
> witam,
>
> jak sprawdzic czy dla integerow a,b,c,d zachodzi
>
> a*b == c*d


int NWD(int a, int b)
{
int c;
while (b != 0)
{
c = a % b;
a = b;
b = c;
}
return a;
}

int Signs(int x, int y)
{
if (x == 0 || y == 0)
return 0;
if ((x<0 && y<0) || (x>0 && y>0))
return 1;
return -1;
}

BOOL Check_ABeqCD(int a, int b, int c, int d)
{
int s1 = Signs(a, b);
int s2 = Signs(c, d);

if (s1 != s2)
return FALSE;

if (s1 == 0)
return TRUE;

a = a > 0 ? a : -a;
b = b > 0 ? b : -b;
c = c > 0 ? c : -c;
d = d > 0 ? d : -d;

int nwd = NWD(b, c);
b /= nwd;
c /= nwd;

if (a/c==d/b && a%c==0 && d%b==0)
return TRUE;

return FALSE;
}