Using an EOF statement with character reversing(about earlier post)

[Guest_imported]

I want to thank you guys for helping me out earlier about reversing characters in arrays, but I forgot to add that the program has to be able to read in as many characters as the user wants until EOF(ctrl+z, right?), then reverse them all. This is what I have so far(keep in mind that that I just used 30 to test my loops to see if it was reversing the characters). Now, I just need to fit in a while loop to continue to read until the user enters "CTRL+Z.":

#include <stdio.h>

void main()

{

static char phrase[80];
char ch;
int i;

while(ch = getchar(), ch >= 0)

for(i=0; i<80; ++i)
scanf(&quot;%c&quot;, &phrase);

for(i=79; i>=0; --i)
printf(&quot;%c&quot;, phrase);

}


Again, I thank you for the help. My college professor is no help whatsoever.