FIFO(LINKED LISTS)

[Aldair -]

Well guys , i have a problem , i have got my linked list , it add numbers (to the list) , and show numbers(from the list ) , but i can´t add the numbers of the list , i really need help , if the list would be:
1) 23 , 2) 24 , 3) 25 .... the addition must be : 1) 23 , 2) (23+24)=47 (just showing 47) , 3)(47+25)=70 (just showing 70)

      #include <iostream>
        #include <stdio.h>
        #include <stdlib.h>


    using namespace std;

    struct nodo{
           int nro;
           struct nodo *sgte;
    };

    typedef struct nodo *Tlista;

    void insertarInicio(Tlista &lista, int valor)
    {
        Tlista t, q = new(struct nodo);

        q->nro  = valor;
        q->sgte = NULL;

        if(lista==NULL)
        {
            lista = q;
        }
        else
        {
            t = lista;
            while(t->sgte!=NULL)
            {
                t = t->sgte;
            }
            t->sgte = q;
        }

    }
    void mostrarLista(Tlista lista)
    {
         int i = 0;

         while(lista != NULL)
         {
              cout <<' '<< i+1 <<") " << lista->nro << endl;
              lista = lista->sgte;
              i++;
         }
    }
    void menu1()
    {
        cout<<"\t\t\t            FIFO            "<<endl;
        cout<<"\t\t_______________________________________\n"<<endl;
        cout<<"\t\t\t 1. REGISTER TIMES              "<<endl;
        cout<<"\t\t\t 2. SHOW LIST            "<<endl;
        cout<<"\t\t\t 3. SOLVE METHOD                  "<<endl;
        cout<<"\t\t\t 4. EXIT                            "<<endl;
        cout<<"\t\t_______________________________________\n"<<endl;
        cout<<"\t\t\t CHOOSE AN OPTION: ";
    }

    void fifo(Tlista lista)
    {
        //HERE MUST BE THE CODE TO ADD THE LIST NUMBERS 
    }

    /*                        principal function
    ---------------------------------------------------------------------*/

    int main()
    {
        Tlista lista = NULL;
        int op;     //menu option
        int _dato;  // number to add

        system("color 0b");

        do
        {
            menu1();  cin>> op;

            switch(op)
            {
                case 1:

                     cout<< "\n TIME OF PROCCESS : "; cin>> _dato;
                     insertarInicio(lista, _dato);
                break;

                case 2:

                     cout << "\n\n SHOWING LIST\n\n";
                     mostrarLista(lista);
                break;

               case 3:

                     cout << "\n\n SOLVED \n\n";
                     fifo(lista);
                break;


            }

            cout<<endl<<endl;
            system("pause");  system("cls");

        }while(op!=4);

        system("pause");
        return 0;
    }

[Taywin]

You simply add a sum variable inside your mostrarLista() and keep adding it. Display the variable instead of the value inside your node. Does that make sense?

PS: Next time, please show your sample output, so that people do not need to dig into your code in order to understand the issue.