#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define vzf 8000.0

int main(int i, char *p[]){
    if(i!=4){
    printf("Problem s parametry");
    return 1;
    }
    double dt,t,u,f,a,b,ct=0,omega;
    int c,v;
    
    u = atof(p[1]);
    f = atof(p[2]);
    t = atoi(p[3]);
    if(f<0 || t<0 || u<0){
    printf("nektery parametr je v minusu")
    return 2;
}
    
    printf("amplituda:%9.6fV frekvence:%9.6fHz doba trvani%9.6fs\n\n",u,f,t);
    dt=1/vzf;
    omega=2*M_PI*f;
    v=t/dt;
    printf("%d\n",v);
    double *pole=malloc(v*sizeof(double));
    for(c=0;c<v;c++){
	ct=ct+dt;
	pole[c]=u*sin(omega*ct);
    }
    ct=0;
    a=sin(2*M_PI*(f/vzf));
    b=2*cos(2*M_PI*(f/vzf));
    double *poledsp=malloc(v*sizeof(double));
    for(c=2;c<v;c++){
	poledsp[c]=pole[c]+pole[c-1]*a+pole[c-2]*b;
    }
    for(c=0;c<v;c++){
	ct=ct+dt;
	printf("cas:%9.6f sin:%9.6f dsp:%9.6f\n",ct,pole[c],poledsp[c]);
    }
free(pole);
free(poledsp);
return 0;
}