My Unforgetable C-Program

int main()
{
int c=25,i=5;
do
{
c=c/i;
c=c*i;
printf("%d",c);
}
while(i--);
}

I came across this program when i was attending an aptitude test for HCL, during my college days.
And this is the program that helped me to learn about postfix and prefix.
Hope this might help some of the readers.
thanks.