#include <iostream>
#include <math.h>

using namespace std;

int main()
{
        int j, m, a, jl, ml, al, nbjours;
        
        cout << "Vous avez le choix dans la date à entrer." << endl;
        cout << "Entrez le jour :";
        cin >> j;
        cout << "Entrez mois :";
        cin >> m;
        cout << "Entrez l'année:";
        cin >> a;


        switch(m)
        {
                case 2:
                        if (a%4 == 0)
                        {
                                nbjours = 29;
                        }
                        else
                         {
                                nbjours = 28;
                        }
                        break;
                case 1:
                case 3:
                case 5:
                case 7:
                case 8:
                case 10:
                case 12:
                        nbjours = 31;
                        break;
                case 4:
                case 6:
                case 9:
                case 11:
                        nbjours = 30;
                        break;
        }
        
        if ( j < nbjours)
        {
                jl = j+1;
                ml = m;
                al = a;
        }
        else
        {
                if (m==12)
                {
                        jl = 1;
                        ml = 1;
                        al = a+1;
                }
                
                jl=1;
                ml = m +1;
                al = a;
        }
        
        
        cout << "La date du lendemain de " << j << "/" << m << "/" << a << " est " << jl << "/" << ml << "/" << al << endl;
}