password strength algorithm in c++

Aquaryus01 · Aquaryus01 · commit ec042cdab35c · 2017-10-29T01:28:56.000+03:00
diff --git a/algorithms/PasswordStrength.cpp b/algorithms/PasswordStrength.cpp
@@ -0,0 +1,72 @@
+#include <iostream>
+
+using namespace std;
+
+class PasswordStrength
+{
+    private:
+        string password;
+    public:
+
+        friend istream& operator>>(istream& fin, PasswordStrength& pass)
+        {
+            fin >> pass.password;
+            return fin;
+        }
+
+        void strength()
+        {
+              bool hasLetter = false;
+              bool hasDigit = false;
+              bool hasUpperCase = false;
+              bool hasLowerCase = false;
+              bool hasMuchLetter = false;
+
+
+              if(this->password.length()>=8)
+                  hasMuchLetter = true;
+
+              for(int i=0; i<this->password.length(); i++)
+              {
+                    if (isupper(this->password[i]))
+                    {
+                        hasUpperCase = true;
+                    }
+                    if (islower(this->password[i]))
+                    {
+                        hasLowerCase = true;
+                    }
+                    if (isalpha(this->password[i]))
+                    {
+                        hasLetter = true;
+                    }
+                    if(isdigit(this->password[i]))
+                    {
+                        hasDigit = true;
+                    }
+              }
+
+              if(hasLetter && hasDigit && hasUpperCase && hasLowerCase && hasMuchLetter)
+                    cout<<"very strong";
+              else if(hasLetter && hasDigit && (hasUpperCase || hasLowerCase) && hasMuchLetter)
+                    cout<<"strong";
+              else if(hasLetter && hasDigit && hasUpperCase==false && hasLowerCase==false && hasMuchLetter)
+                    cout<<"good";
+              else if(hasLetter && hasDigit && password.length()==false && hasUpperCase==false && hasLowerCase==false)
+                    cout<<"weak";
+              else if((hasLetter==false && hasDigit) || (hasLetter && hasDigit==false) && password.length()==false && hasUpperCase==false && hasLowerCase==false)
+                    cout<<"very weak";
+              else
+                    cout<<"weak";
+
+
+        }
+
+};
+
+int main()
+{
+    PasswordStrength pass;
+    cin>>pass;
+    pass.strength();
+}
