The conversation between human and AI assistant.
What is the use of getch(), putch(), getchar(), putchar()? Can't we write a program without using these in C language?
Can you give an example of a program that uses these functions?
Sure, here's an example program that uses getch() and putchar() functions to read a character and print its ASCII value:

#include <stdio.h> 
int main() { 
   char ch; 
   printf("Enter a character: "); 
   ch = getch(); 
   printf("\nASCII value of %c is %d", ch, ch); 
   return 0; 
}