loesung-1a.c

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

int main (void)
{
  double C = 0.0001;
  double U0 = 5.0;
  double U = U0;
  double R = 33000.0;
  double t = 0.0;
  double dt = 0.01;
  double Q = C * U;
  while (U > 0.09)
    {
      printf ("%10.3lf%15.8lf\n", t, U);
      double I = U / R;
      Q -= I * dt;
      U = Q / C;
      t += dt;
    }
  return 0;
}