How do I let the user enter two commands in one line on the cmd ?

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Hi,
I've been trying to write a code that lets the user enter some commands on the cmd screen.
The project is about adding nodes with data to a linked list . the data is entered by the user typin' "add" and followed by a number, but the other info of the node must be entered by using "set - the number of the node - name of the variable - its value ",

I've tried, but i couldn't let them be in one line like this:
> add 0324782012
(create a new node with number = 0324782012)
> set 0324782012 title Data Structures Using C++
(set the title of node 0324782012 to “Data Structur
es Using C++”) .

The Node has an int number and a string title .

could you please help ?

What I have tried:

C++

int main(){
	Node* node =NULL;	 
	string line,line2;
	while(getline(cin, line)){	

		istringstream command (line);
		string cmd;
		command >> cmd;

			if(cmd == "add")
			{
				int x;
				command >> x;
				add(&node,x);
				cout<<"The node with number "<<node->number<<" has been added."<<endl;
			}
			else if(cmd == "set")
			{
				Node* p=node;
				int x;
				command >> x;
				while (p!=NULL){
					
					if (p->number==x){

						while ( getline(cin, line2) ){
							istringstream command_in (line2);
							string cmd_in;
							command_in>>cmd_in;

						if(cmd_in == "title"){
							string y;
							command_in  >> y ;
							title(&p,y);
							break;
						}
                            }break;}
                p=p->next;
				
				}
else cout << "Invalid Command" << endl;
	}

}

Posted 24-Oct-16 4:42am

Member 12812147

Updated 24-Oct-16 4:52am

v2

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Comments

[no name] 24-Oct-16 10:51am

Have a look at command line arguments here http://www.cprogramming.com/tutorial/lesson14.html

Richard MacCutchan 24-Oct-16 11:49am

Why not just tell the user that multiple commands must be separated by some control character (semi-colon would be a good choice)? All your program then needs to do is split the input round those characters and process each substring as a command.

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Leo Chapiro · Answer 1 · 2016-10-24T04:52:00

This is simple: your call <yourprogram> "add 0324782012" "set 0324782012 title Data Structures Using C++"

You get argc == 3 and you can get

C++

argv[0] with "yourprogram" 
argv[1] with "add 0324782012" 
argv[2] with "set 0324782012 title Data Structures Using C++"

The separator is the blank and you need to take care of correct quoting.

To see how to get the parameter you can use this simple example:

C++

int main(int argc, char* argv[]) 
{
	cout << "argc = " << argc << endl;

	for (int i = 0; i < argc; i++)
		cout << "argv[" << i << "] = " << argv[i] << endl;

	return 0;
}

The output:

argc = 3
argv[0] = x:\myprogram.exe
argv[1] = add 0324782012
argv[2] = set 0324782012 title Data Structures Using C++