2 lygis | 2 pamokėlė | 7.Paprastoji trupmena, autoriaus spr.

#include <fstream>
#include <iomanip>
#include <cmath>

using namespace std;

//konstantos
const char Dfv[] = "Duom.txt";
const char Rfv[] = "Rez.txt";

//funkcijos
void Prastinti (int & s, int & v);
void Sveikoji_Dalis (int & a, int & s, int & v);
void Suma (int a1, int s1, int v1, int a2, int s2, int v2, int & a, int & s, int & v);
void Skirtumas (int a1, int s1, int v1, int a2, int s2, int v2, int & a, int & s, int & v);
void Spausdinti (ofstream & fr, int a, int s, int v);

int main()
{
        int n;
        int a1, s1, v1,         //pirma trupmena
            a2, s2, v2;         //antra trupmena
        int a, s, v;           //atsakymas

        ifstream fd (Dfv);
        ofstream fr (Rfv);

        fd >> n;
        fr << "-------------------------------------------------------" << endl;
        fr << "           T1              T2               Suma         Skirtumas  " << endl;
        fr << "-------------------------------------------------------" << endl;
        for (int i = 1; i <= n; i++)
        {
            fd >> a1 >> s1 >> v1 >> a2 >> s2 >> v2;
            Spausdinti (fr, a1, s1, v1);
            Spausdinti (fr, a2, s2, v2);
            Suma (a1, s1, v1, a2, s2, v2, a, s, v);
            Spausdinti (fr, a, s, v);
            Skirtumas (a1, s1, v1, a2, s2, v2, a, s, v);
            Spausdinti (fr, a, s, v);
            fr << endl;
        }
        fd.close ();
        fr.close ();
        return 0;
}
//suprastina trupmena
void Prastinti (int & s, int & v)
{
        int x = s;
        int y = v;
        while ( (x != 0) && (y != 0))
           if (x >= y)
              x = x % y;
           else
              y = y % x;
        int DBD = x + y;
        s = s / DBD;
        v = v / DBD;
}
//sveikosios dalies isskirimas
void Sveikoji_Dalis (int & a, int & s, int & v)
{
        a = s / v;
        s = s % v;
}
//sumos skaiciavimas
void Suma (int a1, int s1, int v1, int a2, int s2, int v2, int & a, int & s, int & v)
{
        s = s1 * v2 + s2 * v1;
        v = v1 * v2;
        Prastinti (s, v);
        if (s >= v)
            Sveikoji_Dalis (a, s, v);
        else
            a = 0;
        a += a1 + a2;
}
//skirtumo skaiciavimas
void Skirtumas (int a1, int s1, int v1, int a2, int s2, int v2, int & a, int & s, int & v)
{
        int zenkl = 0;
        s1 = a1 * v1 + s1;
        s2 = a2 * v2 + s2;
        s = s1 * v2 - s2 * v1;
        v = v1 * v2;
        if (s < 0)
        {
            zenkl = 1;
            s = -s;
        }
        Prastinti (s, v);
        if (s >= v)
            Sveikoji_Dalis (a, s, v);
        else
            a = 0;
        if (zenkl == 1)
            if (a == 0)
                s = -s;
            else
                a = -a;
}
//veiksmo atsakymo spausdinimas
void Spausdinti (ofstream & fr, int a, int s, int v)
{
        if (a == 0)
            fr << setw(6) << " ";
        else
            fr << setw(6) << a;
        if (s != 0)
            fr << setw(3) << s << " /" << setw(2) << v;
        else
            fr << "         ";
}