merging programs??

[yin]

So i have three ncurses programs (each one has a main, a cpp and a few header files and text files) and one oop (with text files and one main).

This is the idea of how the finished ONE program should look:

choose option:
1
2
3

if option 1 is chose then 'x' ncurses program is shown
if option 2 then 'y' ncurses program is shown
and so on.

How would you suggest I merge these programs?

[mbozzi]

Write a fourth program

int main(int argc, char** argv)
{
  if (argc != 2) 
  { 
    print_usage(argc, argv);
    return 1;
  }

  if (argv[1] == "1"sv)
    system("run x"); // eg
  if (argv[1] == "2"sv)
    system("run y");
  // ...
}

[yin]

@mbozzi

so if argv[1] == "1"sv
system("run x")
means that if the user selects option 1 then this ncurses program is run?

[mbozzi]

Yes. It's a sketch; you'll need to adapt the code for your own environment.

Or preferably, just write this fourth program in shell: that's what it exists for.

[Ganado]

You can also just paste together the "main.cpp" (or equivalent) files into one program, rename functions or use namespaces as necessary to avoid name conflicts, and then do the logic mbozzi wrote, but change it to

int main()
{
    // get option from user
    if (option A)
    {
        mainA();
    }
    else if (option B)
    {
        mainB();
    }
    else if (option C)
    {
        mainC();
    }
}

And you'd need to copy any other header/implementation files.

[yin]

thank you! @ganado

[yin]

Hi so these are long long programs like these. Is it still possible to do it using if..else if...else if?

forgotpass.cpp

#include <iostream>
#include <curses.h> 
#include <assert.h>   
#include "coord.h"  
#include <string> 
#include <fstream>
using namespace std;
fstream pass;
char c;  
string newpassword; 
string confpassword;
int movement;
enum movement {ebox,pbox,obox,cbox};
coord frontcursorloc[4]={coord(22,4),coord(22,7),coord(20,13),coord(38,13)}; 

void cycletab(){
    int i=movement++%4;
    move(frontcursorloc[i].my,frontcursorloc[i].mx);
    cout << frontcursorloc[i].my;
} 

void nxtbox(){
noecho();
keypad(stdscr, TRUE);  
cycletab();

while (int c=getch()){
int tab=(movement%4==0)?3:movement%4-1;
assert(tab >= 0 && tab < 4);
switch (c){ 

	case 10:
  case -53:
		//if (c==' '){ 
			if(tab==obox)return;
			if(tab==cbox){
   	 	    	newpassword="<no input>"; 
					confpassword="<no input>";
			return;
			}
      break;
		//}

	case KEY_RIGHT:
		cycletab();
		break;
 
	default:
    switch(tab){ 
      case ebox:
      if(int(c)!=127)printw("%c",'*');
       newpassword.append(1,c);
      break;
			case pbox:
       if(int(c)!=127)printw("%c",'*');
       confpassword.append(1,c);
      break;
        }

}
}
}

 
void displayresetpass(){  
	initscr(); 
	int x=0, y=1, w=60, h=15;
	WINDOW *win = newwin(h,w,y,x);
	refresh();
	move(1, 27);
	attron(A_BOLD);
	printw("RESET PASS");
	box(win, 0, 0);
	wrefresh(win);
}

void displaynewpass(){
	mvprintw(4,4,"new pass");
	WINDOW* ebox = newwin(3, 35, 3, 20);
	refresh();
	box(ebox, 0, 0); 
	wrefresh(ebox);
}

void displayconfPassword(){
	mvprintw(7, 4, "confirm new pass");
	WINDOW* pbox = newwin(3, 35, 6, 20);
	refresh();
	box(pbox, 0, 0);
	wrefresh(pbox);
}

void displayOkCancel(){
	WINDOW*  obox = newwin(3, 10, 12, 14);
	refresh();
	box(obox, 0, 0);
	attron(A_BOLD);
	mvwprintw(obox, 1, 1, "   OK");
	attron(A_BOLD);
	wrefresh(obox);


	WINDOW* cbox = newwin(3, 10, 12, 34);
	refresh();
	box(cbox, 0, 0);
	attron(A_BOLD); 
	mvwprintw(cbox,1, 1, " CANCEL");
	attron(A_BOLD);
	wrefresh(cbox);
}  

void comparepass(string newpassword, string confpassword){
	    if (newpassword != confpassword) 
        cout << "error: passwords do not match";
			else if (newpassword == confpassword) {
      	cout << "passwords match. pass has been reset.";
				pass.open("newpass.txt");
				pass<<confpassword;
				pass.close();
			}
			else
			cout<<"error";
}


int main(){
initscr();
noecho();
cbreak();
	displayresetpass();
	displaynewpass(); 
	displayconfPassword(); 
	displayOkCancel();
	nxtbox();
	getch();
	endwin();
cout << "\n\nnew-passw received was : " << newpassword << endl;
cout << "confirmed-passw obtained was : " << confpassword << endl;
comparepass(newpassword, confpassword);
	return 0;
}

[yin]

oop.cpp

#include <iostream>
using namespace std;
#include <fstream>
#include <string>
#include <limits.h>

class user {
	public:
		char choice1;		
		string newpass;
		fstream usernames;
		fstream pswd;
		fstream npswd;
		fstream rnusernames;
		fstream rnpass;
		fstream rmaide;
};

class olduser : public user {
	private:
	string temp;
	string temp1;
	string temp2;
	string username;
	string userpass;
	string newuserpass;
	string loginyn;
	string mynewpass;

	public:
		int checkusername(){
		usernames.open("names.txt");
		cout << "\nplease enter your username   ";
		cin >> username; 
		while ((usernames >> temp)) { 
			if (temp.compare(username) == 0) {
				usernames.close();
				return 1;
			}
		}
		usernames.close();
		return 0;
		}
		
		int checkpassword(){
		cout<<"please enter your password   ";
		cin>>userpass;
		pswd.open("pass.txt");
			while (pswd >> temp1) { 
				if (temp1.compare(userpass) == 0){
					cout<<"\n[ "<<username<<" ] having password [ "<<userpass<<" ] has been found in the database.\n\n";
					pswd.close();
					return 1;
				}
			}
		pswd.close();
		return 0;
		}
		int checknewpassword(){
		cout<<"please enter your password   ";
		cin>>newuserpass;
		npswd.open("newpass.txt");
			while (npswd >> temp2) { 
				if (temp2.compare(newuserpass) == 0){
					cout<<"Congratulations!!! You have successfully logged in with your new password.";
					npswd.close();
					return 1;
				}
				else{
					cout<<"ACCESS DENIED";
				}
			}
		npswd.close();
		return 0;
		}
		
		int creatnewpass(){
		cout<<"Password: ";
		cin>>mynewpass;
		npswd.open("newpass.txt");
		npswd<<mynewpass;
		npswd.close();
			cout<<"\nLogin now? (y/n) ";
		cin>>loginyn;
			if(loginyn=="y"){
				cout<<"\n        [LOGIN PROCESS STARTING...]\n";
				checkusername();
				checknewpassword();
			}
		return 0;
		}
		private:
};

class newuser :  public user {
	private:
	string nusername;
	string rpass;
	string maiden;

	public:
		void askusername(){
			cout<<"\nUsername: ";
			cin>>nusername;
			rnusernames.open("newnames.txt");
			rnusernames<<nusername;
			rnusernames.close();
		}

		void askuserpass(){
			cout<<"Password: ";
			cin>>rpass;
			rnpass.open("newpass.txt");
			rnpass<<rpass;
			rnpass.close();
		}

		void askMMN(){
			cout<<"Mother's maiden name: ";
			cin>>maiden;
			rmaide.open("maidennames.txt");
			rmaide<<maiden;
			rmaide.close();
		}
};

int main() {
newuser r;
user u;   
olduser verify; 
int attempts, success;
cout<<"\nAre you a new user? (y/n) ";
cin>>u.choice1;
	if (u.choice1 == 'n'){
		for (attempts = 1; attempts < 4; attempts++){
			success = verify.checkusername();
				if (success == 1) { 
					break; 
				}
			}
		if (success == 0){
			cout<<"\nACCESS DENIED\n";
			cin.ignore();
			abort();
		}
		verify.checkpassword();
		cout<<"would you like to create a new password? (y/n) ";
		cin>>u.newpass;
			if (u.newpass=="y"){
				verify.creatnewpass();
			}
			else if (u.newpass=="n"){
				cin.ignore();
				abort();
			}
	}
	else if (u.choice1 == 'y'){
		r.askusername();
		r.askuserpass();
		r.askMMN();
		cin.ignore();
		abort();
	}
	else {
		cout<<"Error";
	}
return 0;
}

[Ganado]

Regardless of how complicated the individual programs are, they will all eventually start with a main() function. This is the function that needs to be repurposed, renamed into "main2" and then called from the real main() function that you make. The real main function can be quite short, and just calls the other main functions, which do the heavy lifting.

If this is too much of a burden, then just go with what mbozzi said; there's nothing wrong with it, I was just suggesting an alternative.