Command Line Menu in C - c

Question

I'm trying to implement a command line menu in C so that when the user enters a character, it will instantly process the character and carry out specific functions. The problem is, whenever I try to make it so that after each input is processed, the menu displays again and is ready for new input, the program will just continually read input and never process it unless I exit the program.
This is the code that works 1 time through:
char command;
command = getchar();
switch(command){
case 'c':
//create a new hash table;
break;
case 'l':
//look up a word;
break;
case 'f':
//read a file
break;
case 'p':
//print the table;
break;
case 'r':
//Remove a word
break;
case 'q':
exit(0);
break;
}
However, if I try to place it into an infinite loop to continually run, like I said, it will never process the inputs until I exit the program.

Answer 1

This code should work for you — it works for me. Note the use of int for the variable command.
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
int main(void)
{
int command;
while ((command = getchar()) != EOF)
{
switch(command)
{
case 'c':
printf("Create a new hash table\n");
break;
case 'l':
printf("Look up a word\n");
break;
case 'f':
printf("Read a file\n");
break;
case 'p':
printf("Print the table\n");
break;
case 'r':
printf("Remove a word\n");
break;
case 'q':
printf("Quit\n");
exit(0);
break;
default:
printf("Unexpected input %d (0x%.2X) ('%c')\n",
command, command, isgraph(command) ? command : '.');
break;
}
}
return 0;
}