int main() {
/*Driver code to test the implementation*/
head = NULL; // empty list. set head as NULL.
// Calling an Insert and printing list both in forward as well as reverse direction.
InsertAtTail(2); Print(); ReversePrint();
InsertAtTail(4); Print(); ReversePrint();
InsertAtHead(6); Print(); ReversePrint();
InsertAtTail(8); Print(); ReversePrint();
}
void ReversePrint(Node *head)
{
if (head) {
ReversePrint(head->next);
printf("%d\n", head->data);
}
}
void ReversePrint(Node *head)
{
// This is a "method-only" submission.
// You only need to complete this method.
if(!head) return;
ReversePrint(head->next);
cout << head->data << endl;
}
void ReversePrint(Node *head) {
// This is a "method-only" submission.
// You only need to complete this method.
if (head) {
ReversePrint(head->next);
printf("%d\n", head->data);
}
}
/*
Print elements of a linked list in reverse order as standard output
head pointer could be NULL as well for empty list
Node is defined as
struct Node
{
int data;
struct Node *next;
}
*/
void ReversePrint(Node *head)
{
if(head == NULL)
return;
ReversePrint(head->next);
cout << head -> data << endl;
}
/*
Print elements of a linked list in reverse order as standard output
head pointer could be NULL as well for empty list
Node is defined as
struct Node
{
int data;
struct Node *next;
}
*/
void ReversePrint(Node *head)
{
Node *currentNode = head;
if(currentNode == NULL){
return;
}
ReversePrint(currentNode->next);
cout <<currentNode->data<<endl;
}
//test recursive call in printing node
void ReversePrint(Node *p)
{
if(p == NULL) //tail
{
return;
}
//printf("%d ", p->data);
ReversePrint(p->next);
printf("%d ", p->data);
}
/*
Print elements of a linked list in reverse order as standard output
head pointer could be NULL as well for empty list
Node is defined as
struct Node
{
int data;
struct Node *next;
}
*/
void
ReversePrint(Node *head)
{
if(head == NULL) {
return;
}
if(head->next == NULL) {
printf("%d\n", head->data);
} else {
ReversePrint(head->next);
printf("%d\n", head->data);
}
}
/**
* built-in commands: exit, in, out, bg, fg, jobs, kill
* returns 1 if a built-in command is executed,
* 0 otherwise
*/
int checkBuiltInCommands()
{
if (strcmp("history", commandArgv[0]) == 0) {
ReversePrint();
}
if (strcmp("alias", commandArgv[0]) == 0) {
return 0;
}
if(strcmp("which", commandArgv[0]) == 0) {
if (commandArgv[1] == NULL) {
printf("R-Shell: Missing Parameters\n");
}
else {
printwhich();
}
return 1;
}
if(strcmp("where", commandArgv[0]) == 0) {
if (commandArgv[1] == NULL) {
printf("R-Shell: Missing Parameters\n");
}
else {
printwhere();
}
return 1;
}
if(strcmp("setenv", commandArgv[0]) == 0) {
envset();
return 1;
}
if(strcmp("printenv", commandArgv[0]) == 0) {
envprint();
return 1;
}
if (strcmp("pid", commandArgv[0]) == 0) {
printpid();
return 1;
}
if (strcmp("pwd", commandArgv[0]) == 0) {
printpwd();
return 1;
}
if (strcmp("prompt", commandArgv[0]) == 0) {
promptCmd();
return 1;
}
if (strcmp("exit", commandArgv[0]) == 0) {
exit(EXIT_SUCCESS);
}
if (strcmp("cd", commandArgv[0]) == 0) {
changeDirectory();
return 1;
}
if (strcmp("kill", commandArgv[0]) == 0) {
if (commandArgv[1] == NULL)
return 0;
killJob(atoi(commandArgv[1]));
return 1;
}
if (strcmp("ls", commandArgv[0]) == 0) {
return 0;
}
if (strcmp("cd", commandArgv[0]) == 0) {
return 0;
}
return 0;
}
