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

double f(double t, double y)
{
   return y;
}

int main()
{
   double h=0.1, y, t;
   int i;
   
   t=0.0; y = 1.0;
   printf("t        Euler    Exact\n");
   for (i=0; i<= 10; i++)
   {
      printf("%lf %lf %lf\n", t, y, exp(t));
      y=y+h*f(t, y);
      t=t+h;
   }
   return 0;
}