From da89ad4a38d8b0049a2e65a7c839b5ed732f9b54 Mon Sep 17 00:00:00 2001
From: "Md. Joynal Alam" <59138477+joynalam67598@users.noreply.github.com>
Date: Sat, 21 Aug 2021 20:11:05 +0600
Subject: [PATCH] Class vs. Instance.cpp

Class vs. Instance in C++.
---
 30 Days of Code/Day 04/Class vs. Instance.cpp | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 30 Days of Code/Day 04/Class vs. Instance.cpp

diff --git a/30 Days of Code/Day 04/Class vs. Instance.cpp b/30 Days of Code/Day 04/Class vs. Instance.cpp
new file mode 100644
index 0000000..98340b0
--- /dev/null
+++ b/30 Days of Code/Day 04/Class vs. Instance.cpp	
@@ -0,0 +1,30 @@
+class Person{
+    public:
+        int age;
+        Person(int initialAge);
+        void amIOld();
+        void yearPasses();
+};
+
+    Person::Person(int initialAge){
+      
+      //code to run some checks on initialAge
+        if(initialAge<0) {cout<<"Age is not valid, setting age to 0."<<endl;age=0;}
+        else age = initialAge;
+
+    }
+
+    void Person::amIOld(){
+      
+      // code to determine if this person's age is old and print the correct statement:
+        if(this->age<13) cout<<"You are young."<<endl;
+        else if(this->age>=18) cout<<"You are old."<<endl;
+        else cout<<"You are a teenager."<<endl;
+
+    }
+
+    void Person::yearPasses(){
+      
+      // Increment this person's age by 1.
+        age++;
+    }