int main()
{

        double a=1.25, b=1.5, c=1.1, d=0, e, f;

        while (a <= 1.51) {
        while (b <= 1.51) {
        while (c <= 1.51) {
        d=7.11 - a - b - c;
        e=a*b*c*d;
        f=a+b+c+d;
        if (f==e)//{
        cout << "\n\nRadau!!! " << a << " " << b << " " << c << " " << d << endl << endl << endl;
        c=c+0.01;}
        b=b+0.01;}
        a=a+0.05;}
        system ("pause");
        return 0;

}

Uzdavinys: Keturiu skaiciu suma ir sandauga lygi 7.11.
Atsakymas 1.25 1.5 1.2 3.16
Bet kazkodel programa jo neranda. :/
Neuzskaito kaip gero atsakymo.