can any one help me with this shell problem please

The
shell will loop continuously to accept user commands; it will terminate when "exit" is
entered. The command line prompt must contain the pathname of the current directory.
Internal commands
The shell must support the following internal commands:
First: /ayed/ > cd [[<pathname>] <directory>]
Change the current default directory to <directory>. If the <directory> is not present,
report the current directory. If the directory does not exist an appropriate error message
should be reported.
e.g.
/ayed/> cd project or /ayed/> cd /ayed/project
Second: History
Display a history of the last 10 commands executed on the shell.
Third : exit
Quit the shell.
Other than that the program shall read, parse and interpret the command and call the
appropriate command from the existing shell.
For simplicity sake, assume that only the following commands can be input to the shell:
1. ls
2. ls -l
3. date
4. pico <filename>
5. history
6. man <subject>
7. diff <filename1> <filename2>
8. set
9. who
10. rlogin <host-name>
The shell should fork a new process for each executed command.

Program Skeleton:
while(! EOF) {
read input
handle regular expressions; // parse the next command by the user.
if(built-in command) {
execute command; continue; }
if(child = fork()) { // create a child to run command
child = wait(&res);
}
else { // command is run here
exec(command, argc, argv0, argv1, …)
}
}

This looks like a HOMEWORK assignment.
Have you tried coding something on your own?

sudo could be can be a simple option just give the user access to the list of commands through sudoers.

well i realy tryed to solve it
this is what i thought of but i just dont know what to do next
so any one can help me and tell me what to do next
i mean i dont know what to fork
can any one help me please
#include <iostream>



void push (char input);
bool IsFull (void);
bool IsEmpty (void);
void pop (void);
void history (void);









using namespace ::std;

char input;
int max=10;
int front=-1;
char *queue;
int rear=-1;
void main(){



cin>> input;

while(input != 'e')


{

if(input=='h'){
push(input);
history();
}

}
if(input=='e')

cout<<"exit"<<endl;





}



void push (char input) {

if (IsFull())
{
pop();
queue[++rear]=input;
}

else
queue[++rear]=input;

}


void pop (void){

if (IsEmpty())
cout<<"Is Empty"<<endl;

else

queue[++front];

}



bool IsFull (void){

if (rear==max-1 && front==-1)
return true;

else
return false;

}




bool IsEmpty (void){

if (rear== front)
return true;

else
return false;

}



void history (void){

while (!IsEmpty())

{
cout<<queue[rear]<<endl;
rear--;
}
}