Program to check Strength of Password

A password is said to be strong if it satisfies the following criteria:

  1. It contains at least one lowercase English character.
  2. It contains at least one uppercase English character.
  3. It contains at least one special character. The special characters are: !@#$%^&*()-+
  4. Its length is at least 8.
  5. It contains at least one digit.

Given a string, find its strength. Let a strong password is one that satisfies all above conditions. A moderate password is one that satisfies first three conditions and has length at least 6. Otherwise password is week.

Examples :

Input : "GeeksforGeeks!@12"
Output : Strong

Input : "gfg!@12"
Output : Moderate




// CPP program to check if a given password is
// strong or not.
#include <bits/stdc++.h>
using namespace std;
void printStrongNess(string& input)
    int n = input.length();
    // Checking lower alphabet in string
    bool hasLower = false, hasUpper = false;
    bool hasDigit = false, specialChar = false;
    string normalChars = "abcdefghijklmnopqrstu"
        "vwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890 ";
    for (int i = 0; i < n; i++) {
        if (islower(input[i]))
            hasLower = true;
        if (isupper(input[i]))
            hasUpper = true;
        if (isdigit(input[i]))
            hasDigit = true;
        size_t special = input.find_first_not_of(normalChars);
        if (special != string::npos)
            specialChar = true;
    // Strength of password
    cout << "Strength of password:-";
    if (hasLower && hasUpper && hasDigit && 
        specialChar && (n >= 8))
        cout << "Strong" << endl;
    else if ((hasLower || hasUpper) && 
             specialChar && (n >= 6))
        cout << "Moderate" << endl;
        cout << "Weak" << endl;
// Driver code
int main()
    string input = "GeeksforGeeks!@12";
    return 0;




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