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how to return in main menu from sub menu

Feb 11, 2021 at 5:38am
azalea520 (8)
hii i need help.. when im in stack or queue menu when i choose exit i need to go back to my main menu without using a goto statements and in a new screen.

i have a missing code in stack case 7 and queue case 6 in order for it to return in the main menu

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 int main (){

    int m_menu,s_menu,q_menu,userInput,searchThis;
    Stack classStack;
    Queue classQueue;
 {
    system("cls");
    cout<<"\n*************************************";
     cout<<"\n\t MAIN MENU\n";
     cout<<"*************************************";
     cout<<"\n\n\t (1) STACK \n\t (2) QUEUE \n\t (3) QUIT \n\n";
    cout<<"Enter your choice:\t";
    cin>>m_menu;
    }

  if (m_menu==1){

    system("cls");
    while (1) {
        cout<<"\n*************************************"<<endl;
        cout<<"\t STACK MENU\n";
        cout<<"*************************************"<<endl;
        cout<<"\n\t (1) Add \n\t (2) Delete \n\t (3) Sort \n\t (4) Top \n\t (5) Display \n\t (6) Search \n\t (7) Exit \n\n";
        cout<<"Enter your choice: \t";
        cin>>s_menu;
        cout<<"-------------------------------------"<<endl<<endl;

     switch (s_menu) {
        case 1:
            cout<<"\n\n\t What do you want to put in your stack? \t";
            cin>>userInput;
            classStack.addStack(userInput);
            break;
        case 2: cout<<"\n\n\t Your deleted value is: \t"<<classStack.deleteTop()<<endl; break;
        case 3: classStack.sortingStack();  break;
        case 4: classStack.topStack();  break;
        case 5: classStack.displayStack();  break;
        case 6:
            cout<<"\n\n\t What are you searching for in your stack?\t";
            cin>>searchThis;
            classStack.searchingStack(searchThis);
            break;
        case 7:
            
        default: cout<<"\n\n\t INVALID INPUT NUMBER!"<<endl;
            } }      }
            
  else if(m_menu==2){
       
    system("cls");
    while (1) {
        cout<<"\n*************************************";
        cout<<"\n\t QUEUE MENU\n";
        cout<<"*************************************";
        cout<<"\n\n\t (1) Add \n\t (2) Delete \n\t (3) Sort \n\t (4) Display \n\t (5) Search \n\t (6) Exit \n\n";
        cout<<"Enter your choice: \t";
        cin>>q_menu;
        cout<<"-------------------------------------";

     switch (q_menu) {
        case 1 :
            cout<<"\n\n\t ADD\n\n\t What do you want to put in your queue? \t";
            cin>>userInput;
            classQueue.addQueue(userInput);
            break;
        case 2:
            cout<<"\n\n\t DELETE \n\t\t\t\t";
            classQueue.deleteFront();
            break;
        case 3:
            cout<<"\n\n\t SORT \n";
            classQueue.sortingQueue();
            break;
        case 4:
            cout<<"\n\n\t DISPLAY \n";
            classQueue.displayQueue();
            break;
        case 5:
            cout<<"\n\n\t SEARCH \n\n\t What are you searching for in your queue?\t";
            cin>>searchThis;
            classQueue.searchingQueue(searchThis);
            break;
        case 6:
            
        default: cout<<"\n\n\tInvalid input number!\n";
         } } }
   else if (s_menu=3){
       return 0;
   }
  else {
        cout<<"\n\n\tInvalid input number!\n"; }

}
Last edited on Feb 11, 2021 at 6:57am
Feb 11, 2021 at 7:06am
salem c (3712)
Break things up into much smaller functions.

You need to add your own doQueue and fix some variables, but still.
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#include <iostream>

int showMainMenu() {
  int m_menu;
  cout<<"\n*************************************";
    cout<<"\n\t MAIN MENU\n";
    cout<<"*************************************";
    cout<<"\n\n\t (1) STACK \n\t (2) QUEUE \n\t (3) QUIT \n\n";
  cout<<"Enter your choice:\t";
  cin>>m_menu;
  return m_menu;
}

int showStackMenu() {
  int s_menu;
  cout<<"\n*************************************"<<endl;
  cout<<"\t STACK MENU\n";
  cout<<"*************************************"<<endl;
  cout<<"\n\t (1) Add \n\t (2) Delete \n\t (3) Sort \n\t (4) Top \n\t (5) Display \n\t (6) Search \n\t (7) Exit \n\n";
  cout<<"Enter your choice: \t";
  cin>>s_menu;
  return s_menu;
}

void doStack() {
  bool done = false;
  while ( !done ) {
    int s_menu = showStackMenu();
    switch (s_menu) {
        case 1:
            cout<<"\n\n\t What do you want to put in your stack? \t";
            cin>>userInput;
            classStack.addStack(userInput);
            break;
        case 2: cout<<"\n\n\t Your deleted value is: \t"<<classStack.deleteTop()<<endl; break;
        case 3: classStack.sortingStack();  break;
        case 4: classStack.topStack();  break;
        case 5: classStack.displayStack();  break;
        case 6:
            cout<<"\n\n\t What are you searching for in your stack?\t";
            cin>>searchThis;
            classStack.searchingStack(searchThis);
            break;
        case 7:
            done = true;
            break;
    }
  }
}

int main ( ) {
  bool done = false;
  while ( !done ) {
    int m_menu = showMainMenu();
    switch (m_menu) {
      case 1:
        doStack();
        break;
      case 3:
        done = true;
        break;
    }
  }
}
Edit & run on cpp.sh
Feb 11, 2021 at 8:19am
azalea520 (8)
thank you it is now going back to the main menu however submenus are not showing in loop
sorry im still new in programming
Feb 11, 2021 at 8:48am
salem c (3712)
You need to post your latest code.
Also, the code I posted was an illustration, not necessarily a copy/paste working example.
Feb 11, 2021 at 9:36am
azalea520 (8)
i tried your code and did some alterations that you've said and when i run the program it doesn't go on loops like how i wanted to. and every choice i chose inside the stack and queue menu it just clears screen and doesn't show their output.


int showMainMenu() {
  int m_menu;
  system ("cls");
  cout<<"\n*************************************";
    cout<<"\n\t MAIN MENU\n";
    cout<<"*************************************";
    cout<<"\n\n\t (1) STACK \n\t (2) QUEUE \n\t (3) QUIT \n\n";
  cout<<"Enter your choice:\t";
  cin>>m_menu;
  return m_menu;
}
int showStackMenu() {
  int s_menu;
  system ("cls");
  while (1){
  cout<<"\n*************************************"<<endl;
  cout<<"\t STACK MENU\n";
  cout<<"*************************************"<<endl;
  cout<<"\n\t (1) Add \n\t (2) Delete \n\t (3) Sort \n\t (4) Top \n\t (5) Display \n\t (6) Search \n\t (7) Exit \n\n";
  cout<<"Enter your choice: \t";
  cin>>s_menu;
  cout<<"-------------------------------------";
  return s_menu; }
}
void doStack() {
    int userInput,searchThis;
    Stack classStack;
  bool done = false;
  while ( !done ) {
    int s_menu = showStackMenu();
    switch (s_menu) {
        case 1:
            cout<<"\n\n\t What do you want to put in your stack? \t";
            cin>>userInput;
            classStack.addStack(userInput);
            break;
        case 2: cout<<"\n\n\t Your deleted value is: \t"<<classStack.deleteTop()<<endl; break;
        case 3: classStack.sortingStack();  break;
        case 4: classStack.topStack();  break;
        case 5: classStack.displayStack();  break;
        case 6:
            cout<<"\n\n\t What are you searching for in your stack?\t";
            cin>>searchThis;
            classStack.searchingStack(searchThis);
            break;
        case 7: done = true;    break;
         default: cout<<"\n\n\tInvalid input number!\n";
    }
  }
}
int showQueueMenu() {
    int q_menu;
    system("cls");
        cout<<"\n*************************************";
        cout<<"\n\t QUEUE MENU\n";
        cout<<"*************************************";
        cout<<"\n\n\t (1) Add \n\t (2) Delete \n\t (3) Sort \n\t (4) Display \n\t (5) Search \n\t (6) Exit \n\n";
        cout<<"Enter your choice: \t";
        cin>>q_menu;
        cout<<"-------------------------------------";
        return q_menu;
}
void doQueue(){
    int userInput,searchThis;
    Queue classQueue;
    bool done = false;
  while (!done) {
    int q_menu = showQueueMenu();
    switch (q_menu) {
        case 1 :
            cout<<"\n\n\t ADD\n\n\t What do you want to put in your queue? \t";
            cin>>userInput;
            classQueue.addQueue(userInput);
            break;
        case 2:
            cout<<"\n\n\t Your deleted value is: \t"<<classQueue.deleteFront();    break;
        case 3: classQueue.sortingQueue();  break;
        case 4: classQueue.displayQueue();   break;
        case 5:
            cout<<"\n\n\t What are you searching for in your queue?\t";
            cin>>searchThis;
            classQueue.searchingQueue(searchThis);
            break;
        case 6: done = true; break;
        default: cout<<"\n\n\tInvalid input number!\n";
    }
  }
}
int main ( ) {
  bool done = false;
  while ( !done ) {
    int m_menu = showMainMenu();
    switch (m_menu) {
      case 1:   doStack();  break;
      case 2:   doQueue();  break;
      case 3:   done = true;  break;
    }
  }
}

Feb 11, 2021 at 10:52am
seeplus (6623)
Perhaps something like:

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#include <iostream>
using namespace std;

struct Stack {
	void addStack(int) {}
	void sortingStack() {}
	void topStack() {}
	void displayStack() {}
	int deleteTop() { return 0; }
	void searchingStack(int) {}
};

struct Queue {
	void addQueue(int) {}
	void sortingQueue() {}
	void topQueue() {}
	void displayQueue() {}
	int deleteFront() { return 0; }
	void searchingQueue(int) {}
};


int showMainMenu() {
	int m_menu {};

	//system("cls");
	cout << "\n*************************************";
	cout << "\n\t MAIN MENU\n";
	cout << "*************************************";
	cout << "\n\n\t (1) STACK \n\t (2) QUEUE \n\t (3) QUIT \n\n";
	cout << "Enter your choice:\t";

	cin >> m_menu;
	return m_menu;
}

int showStackMenu() {
	int s_menu {};

	//system("cls");
	while (1) {
		cout << "\n*************************************" << endl;
		cout << "\t STACK MENU\n";
		cout << "*************************************" << endl;
		cout << "\n\t (1) Add \n\t (2) Delete \n\t (3) Sort \n\t (4) Top \n\t (5) Display \n\t (6) Search \n\t (7) Exit \n\n";
		cout << "Enter your choice: \t";

		cin >> s_menu;
		cout << "-------------------------------------";
		return s_menu;
	}
}

void doStack(Stack& classStack) {
	for (bool done {}; !done; ) {
		switch (showStackMenu()) {
			case 1:
			{
				int userInput {};

				cout << "\n\n\t What do you want to put in your stack? \t";
				cin >> userInput;

				classStack.addStack(userInput);
			}
				break;

			case 2:
				cout << "\n\n\t Your deleted value is: \t" << classStack.deleteTop() << '\n';
				break;

			case 3:
				classStack.sortingStack();
				break;

			case 4:
				classStack.topStack();
				break;

			case 5:
				classStack.displayStack();
				break;

			case 6:
			{
				int searchThis {};

				cout << "\n\n\t What are you searching for in your stack?\t";
				cin >> searchThis;

				classStack.searchingStack(searchThis);
			}
				break;

			case 7:
				done = true;
				break;

			default:
				cout << "\n\n\tInvalid input number!\n";
				break;
		}
	}
}

int showQueueMenu() {
	int q_menu {};

	//system("cls");
	cout << "\n*************************************";
	cout << "\n\t QUEUE MENU\n";
	cout << "*************************************";
	cout << "\n\n\t (1) Add \n\t (2) Delete \n\t (3) Sort \n\t (4) Display \n\t (5) Search \n\t (6) Exit \n\n";
	cout << "Enter your choice: \t";

	cin >> q_menu;
	cout << "-------------------------------------";
	return q_menu;
}

void doQueue(Queue& classQueue) {
	for (bool done {}; !done; ) {
		switch (showQueueMenu()) {
			case 1:
			{
				int userInput {};

				cout << "\n\n\t ADD\n\n\t What do you want to put in your queue? \t";
				cin >> userInput;
				classQueue.addQueue(userInput);
			}
				break;

			case 2:
				cout << "\n\n\t Your deleted value is: \t" << classQueue.deleteFront();
				break;

			case 3:
				classQueue.sortingQueue();
				break;

			case 4:
				classQueue.displayQueue();
				break;

			case 5:
			{
				int searchThis {};

				cout << "\n\n\t What are you searching for in your queue?\t";
				cin >> searchThis;

				classQueue.searchingQueue(searchThis);
			}
				break;

			case 6:
				done = true;
				break;

			default:
				cout << "\n\n\tInvalid input number!\n";
				break;
		}
	}
}

int main() {
	Queue classQueue;
	Stack classStack;

	for (bool done {}; !done; )
		switch (showMainMenu()) {
			case 1:   doStack(classStack);  break;
			case 2:   doQueue(classQueue);  break;
			case 3:   done = true;  break;
			default: cout << "Invalid menu choice\n"; break;
		}
}
Edit & run on cpp.sh


As there's no code for classes Stack and Queue, I've just provided dummies so that the code compiles and the menu's display etc.

Feb 11, 2021 at 11:16am
azalea520 (8)
it goes on loop however the main menu should not appear in the same screen with stack and queue menu


edit: it is now working i just added the system ("cls") in the main program

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int main() {
	Queue classQueue;
	Stack classStack;

	for (bool done {}; !done; )
		switch (showMainMenu()) {
			case 1:  system("cls");   doStack(classStack);  break;
			case 2:  system("cls");   doQueue(classQueue);  break;
			case 3:   done = true;  break;
			default: cout << "Invalid menu choice\n"; break;
		}
}


thankyou so much for your help i really appreciate it.
Last edited on Feb 11, 2021 at 11:32am
Feb 11, 2021 at 11:45am
Handy Andy (5051)
Hello azalea520,

To start with when providing code it is best and very helpful to provide a complete program. Meaning all the header files, Code for any header files that you write and any input file if the that may be needed. An input file does not have to be large, but it does need to contain any record that is giving a problem.

Given some time you will come to understand that seeplus can not use system("cls"); and that is why his output will be different from yours.

Andy
Feb 11, 2021 at 12:44pm
azalea520 (8)
hi Andy thank you for correcting me i understand im still new in programming so im not knowledgeable about others
Feb 11, 2021 at 3:23pm
Handy Andy (5051)
Hello azalea520,

No worries. Sorry for the delay I had to go out for awhile.

I see that you have green checked the post, but if you want to go over your code click on my name and send me a Private Message that I can reply to and I will explain the problems I found in you original code.

Andy
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