#include <stdio.h>
#include <math.h>
#include <stdlib.h>

#define KONECPOLE 10000

int main (int amount, char *para[]) {

    int k;
    double U,Usdp,f,t,Dt = 0.000125, Uok[KONECPOLE+1],a,b,Nvz;

    Uok[0] = 0;
    Uok[1] = 0;



    if (para[1]==NULL || para[2]==NULL || para[3]==NULL) {
	printf("zadej vsechny parametry (3 - Napeti | Frekvence | Cas Trvani)\n");
	return 0;
    }



    U = atof(para[1]);
    if (U<0) {
	printf ("zaporny napeti? to snad nemyslis vazne ty intelektuale\n");
	return 0;
    }

    f = atof(para[2]);
    if (f<0) {
	printf ("zaporna frekvence nejde ty noumo\n");
	return 0;
    }

    t = atof(para[3]);
    if (t<0) {
	printf ("zaporny cas nechceme ty blazne\n");
	return 0;
    }





    a = sin(2 * M_PI * f / 8000);
    b = 2 * cos(2 * M_PI * f / 8000);

    Nvz = t / (Dt * 1000);

    for (k=0; k<=Nvz; k++) {
	Uok[k+2] = U * sin(2 * M_PI * f * Dt * k);
	Usdp = Uok[k+2] + (Uok[k+1] * a) + (Uok[k] * b);
	printf ("%8.6f   |  %9.6f   |  %9.6f\n",Dt * k, Uok[k+2], Usdp);
    }







    double klacky = 19 / 0.35;


    printf ("\n\n\npriklad pro gymplaky se rovna %.30f klacku\n",klacky);
    return 0;
}