/* p4-20b.ch */
#include <control.h>

int main() {
    array double num[1] = {0.04}, 
                 den[3] = {1, 0.02, 0.04},
                 yout[500],
                 tout[500];
    double tf = 500;
    CControl sys;
    CPlot plot;

    sys.model("tf", num, den);
    sys.grid(1);
    sys.step(&plot, yout, tout, NULL, tf);

    return 0;
}