void testcases(void)

{

int c;

char q;

kprintf("===TEST BEGIN=== ");

c = kgetc();

switch (c)

{

// TODO: Test your operating system!

case 'a':

kprintf("===TEST 1=== ");

kungetc('e');

q = kgetc();

kprintf("%c ", q);

break;

This is my test cases to test my program. So far this runs fine and prints out whatever I have in kgetc when I call the corresponding case letter. How do I write in code more test cases that will print out a string of more than one character using the same functions, kungetc, kgetc, etc. For example if I create another case 'b', how would I print out "hello world" without just simply using kprintf?

kungetc - checks if there is room in the unget buffer

kgetc - checks the unget buffer for a character, otherwise it will check the UART flags register, and once the receiver is not empty it will get character c.