#include<iostream>
#include<windows.h>
#include<iomanip>
#include <math.h>
using namespace std;

double fi(double x);
double Uxt (double x, double a, double t);

int main(){
system("chcp 1251 > nul");
double a, t, U;
cout<<"Введите Коэффициент жесткости (a) и Момент времени (t)"<<endl;
cin>>a>>t;
cout<<"x="<<setw(15)<<"U="<<endl;
for (double x=0; x<=10; x+=0.5)
{
    U=Uxt(x,a,t);
    cout<<fixed<<x<<setw(15)<<U<<endl;
}
}


double fi(double x){
    double f;
    if ((x>=3.14) && (x<=6.28))
       f=-sin(x);
else f=0;
    return f;
}


double Uxt(double x, double a, double t){
    double U;
    if (x-a*t<=0)
        U=(fi(x-a*t)+fi(x+a*t))/2;
    else  U=(-fi(a*t-x)+fi(x+a*t))/2;
    return U;
}