damn numerical error in Fortran

program foo
real*8 :: a = 0
integer :: n
do n=0,100,1
print*,a
a = a + 0.01
end do
end program foo

#include <stdio.h>
void main(void)
{
double a = 0;
int n;
for(n=0; n<=100; n++)
{
printf(” %.10f n”,a);
a += 0.01;
}
}