/*
	1. 	Print the program name.
	2.	Print the 3rd character of the program name.
	3.	Ask the user to enter a character, save it with getchar(),
		then display it back to the user with putchar().
	4.	Ask the user to enter a string, save it with scanf(),
		then display it back to the user with printf().
	NOTE: 	In the Output, "k" and "hello" are the echoes. You don't see the 
			input since it's entered automatically. If you typed it out manually,
			you will see "k" and "hello" twice in your terminal.
*/
 
#include <stdio.h>
 
int
main()
{
	int c;							// c is an int value representing a character
	char string_entered[100];		// string_entered is a array of characters
	char *PROGRAM_NAME = "ECHO!";	// string literal for program name
 
	printf("%s\n", PROGRAM_NAME);				// print name of the program
	printf("The 3rd character of the program name is: %c\n", *(PROGRAM_NAME+2));	// access one character of the string, using pointers
 
	printf("Enter a character to echo: \n");	// ask user for a character
	c = getchar();								// getchar() saves the character's ASCII int value to c
	putchar(c);									// putchar() prints the chracter back to the user
	putchar('\n');								// newline
 
	printf("Enter a string to echo: \n");		// ask user for a string
	scanf(" %[^\t\n]", string_entered);			// scanf() gets a string from user, saves it to string_entered
	printf("%s\n", string_entered);				// printf() prints the string back to the user
 
	printf("Goodbye!\n");						// leave the user happy
	return 0;									// terminate program (main function)
}