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 # Exercices POO
 ## Ex 1 - Namespace
 - [namespace.md](https://github.com/tony-maulaz/poo-exercices/blob/main/ex1-namespace.md)
+
+## Ex 10 - Reference
+- [references.md](https://github.com/tony-maulaz/poo-exercices/blob/main/ex10-reference.md)
+
+## Ex 20 - Stdout
+- [stdout.md](https://github.com/tony-maulaz/poo-exercices/blob/main/ex20-stdout.md)
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diff --git a/reference.md b/ex10-reference.md
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rename to ex10-reference.md
diff --git a/ex20-stdout.md b/ex20-stdout.md
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+# Ex 1
+Afficher le texte suivant dans la console.
+
+```console
+Bonjour
+Comment allez-vous ?
+```
+
+# Ex 2
+Écrire un programme qui affiche les valeurs des deux variables.
+
+Le résultat est affiché avec deux chiffres après la virgule.
+
+```CPP
+double val_d = 12.34;
+int cpt = 4;
+```
+
+L'affichage : 
+```console
+Affichage :
+Cpt : 4 / Val : 12.34 
+```
+
+# Solutions
+## Ex 1
+```cpp
+#include <iostream>
+
+using namespace std;
+
+int main()
+{
+    cout<<"Bonjour" << endl << "Comment allez-vous ?";
+    return 0;
+}
+```
+
+## Ex 2
+```cpp
+#include <iostream>
+#include <iomanip>
+
+using namespace std;
+
+int main()
+{
+    double val_d = 12.34;
+    int cpt = 4;
+    
+    cout << "Affichage" << endl;
+    cout << "Cpt : " << cpt << " / Val : " << fixed << setprecision(2) << val_d;
+    return 0;
+}
+```
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diff --git a/ex30-surcharge-fct.md b/ex30-surcharge-fct.md
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+# Ex 1
+
+Écrire une fonction qui permet d'afficher le carré d'un `int` ou d'un `double`.
+
+
+# Ex 2
+Quel est l'affichage du programme suivant ?
+
+```CPP
+#include <iostream>
+#include <iomanip>
+
+using namespace std;
+
+void func(int a){
+    cout << "Val_2 : " << a << endl;
+}
+
+void func(double a){
+    cout << "Val_3 : " << a << endl;
+}
+
+void func1(int a){
+    cout << "Val_1 : " << a << endl;
+    func( (double)a );
+}
+
+int main()
+{
+    double val_d = 2.0;
+    int val_i = 5;
+    
+    func(val_d);
+    
+    func(val_i);
+    
+    func1(val_d);
+    
+    return 0;
+}
+```
+
+
+# Solutions
+## Ex 1
+```CPP
+#include <iostream>
+#include <iomanip>
+
+using namespace std;
+
+void aff(int a){
+    cout << "Res : " << a*a << endl;
+}
+
+void aff(double a){
+    cout << "Res : " << a*a << endl;
+}
+
+int main()
+{
+    double val_d = 2.3;
+    int val_i = 5;
+    
+    aff(val_d);
+    aff(val_i);
+    
+    return 0;
+}
+```
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