Upload 3 C++ Programs (#10033)

Co-authored-by: Vedansh <[email protected]>
Co-authored-by: Manish ✨ <[email protected]>

C++/NumberLife.cxx

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+#include <iostream>
+#include <vector>
+#include <string>
+#include <algorithm>
+#include <random>
+#include <chrono>
+
+using namespace std;
+
+// Function to generate a random password
+string generatePassword(int length) {
+    const string characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_+=-`~[]\{}|;':\",./<>?";
+    random_device rd;
+    mt19937 gen(rd());
+    uniform_int_distribution<> dist(0, characters.size() - 1);
+
+    string password = "";
+    for (int i = 0; i < length; ++i) {
+        password += characters[dist(gen)];
+    }
+    return password;
+}
+
+// Function to check if a number is prime (basic implementation)
+bool isPrime(int number) {
+    if (number <= 1) return false;
+    for (int i = 2; i * i <= number; ++i) {
+        if (number % i == 0) return false;
+    }
+    return true;
+}
+
+int main() {
+    cout << "\nWelcome to the Super Cool C++ Program!\n";
+
+    int choice;
+    do {
+        cout << "\nChoose an option:\n";
+        cout << "1. Generate a Random Password\n";
+        cout << "2. Check if a Number is Prime\n";
+        cout << "3. Sort a List of Numbers\n";
+        cout << "4. Exit\n";
+        cout << "Enter your choice: ";
+        cin >> choice;
+
+        switch (choice) {
+            case 1: {
+                int length;
+                cout << "Enter desired password length: ";
+                cin >> length;
+                string password = generatePassword(length);
+                cout << "Generated Password: " << password << endl;
+                break;
+            }
+            case 2: {
+                int number;
+                cout << "Enter a number to check for primality: ";
+                cin >> number;
+                if (isPrime(number)) {
+                    cout << number << " is a prime number.\n";
+                } else {
+                    cout << number << " is not a prime number.\n";
+                }
+                break;
+            }
+            case 3: {
+                int numCount;
+                cout << "How many numbers do you want to sort? ";
+                cin >> numCount;
+
+                vector<int> numbers(numCount);
+                cout << "Enter the numbers:\n";
+                for (int i = 0; i < numCount; ++i) {
+                    cin >> numbers[i];
+                }
+
+                sort(numbers.begin(), numbers.end()); // Using STL sort
+
+                cout << "Sorted Numbers:\n";
+                for (int num : numbers) {
+                    cout << num << " ";
+                }
+                cout << endl;
+                break;
+            }
+            case 4:
+                cout << "Exiting program. Goodbye!\n";
+                break;
+            default:
+                cout << "Invalid choice. Please try again.\n";
+        }
+    } while (choice != 4);
+
+    return 0;
+}

C++/StringModify.cpp

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+#include <iostream>
+#include <string>
+#include <vector>
+#include <algorithm>
+#include <cctype> // For character manipulation
+
+using namespace std;
+
+// Function to convert a string to uppercase
+string toUpper(string str) {
+    string result = str;
+    for (char &c : result) {
+        c = toupper(c);
+    }
+    return result;
+}
+
+// Function to check if a string is a palindrome (ignoring case and spaces)
+bool isPalindrome(string str) {
+    string cleanStr = "";
+    for (char c : str) {
+        if (isalnum(c)) { // Keep only alphanumeric characters
+            cleanStr += tolower(c); // Convert to lowercase
+        }
+    }
+    string reversedStr = cleanStr;
+    reverse(reversedStr.begin(), reversedStr.end());
+    return cleanStr == reversedStr;
+}
+
+// Function to count the frequency of each letter in a string
+void countLetterFrequency(string str) {
+    vector<int> frequencies(26, 0); // Initialize counts to 0 for each letter (a-z)
+
+    for (char c : str) {
+        if (isalpha(c)) {
+            char lowerC = tolower(c);
+            frequencies[lowerC - 'a']++;
+        }
+    }
+
+    cout << "Letter Frequencies:\n";
+    for (int i = 0; i < 26; ++i) {
+        if (frequencies[i] > 0) {
+            cout << (char)('a' + i) << ": " << frequencies[i] << endl;
+        }
+    }
+}
+
+
+
+int main() {
+    cout << "\nWelcome to the String Manipulation Program!\n";
+
+    int choice;
+    do {
+        cout << "\nChoose an option:\n";
+        cout << "1. Convert String to Uppercase\n";
+        cout << "2. Check if String is a Palindrome\n";
+        cout << "3. Count Letter Frequencies\n";
+        cout << "4. Exit\n";
+        cout << "Enter your choice: ";
+        cin.ignore(); // Clear the newline character from previous input
+        cin >> choice;
+        cin.ignore(); // Clear the newline character from previous input
+
+
+        switch (choice) {
+            case 1: {
+                string inputString;
+                cout << "Enter a string: ";
+                getline(cin, inputString); // Use getline to handle spaces
+                cout << "Uppercase: " << toUpper(inputString) << endl;
+                break;
+            }
+            case 2: {
+                string inputString;
+                cout << "Enter a string: ";
+                getline(cin, inputString);
+                if (isPalindrome(inputString)) {
+                    cout << "\"" << inputString << "\" is a palindrome.\n";
+                } else {
+                    cout << "\"" << inputString << "\" is not a palindrome.\n";
+                }
+                break;
+            }
+            case 3: {
+                string inputString;
+                cout << "Enter a string: ";
+                getline(cin, inputString);
+                countLetterFrequency(inputString);
+                break;
+            }
+            case 4:
+                cout << "Exiting program. Goodbye!\n";
+                break;
+            default:
+                cout << "Invalid choice. Please try again.\n";
+        }
+    } while (choice != 4);
+
+    return 0;
+}

C++/StringReverse.cpp

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+#include <iostream>
+#include <string>
+#include <algorithm>
+
+int main() {
+    string input;
+    std::cout << "Enter a string to reverse: ";
+    getline(cin, input);
+    std::reverse(input.begin(), input.end());
+
+    std::cout << "Reversed string: " << input << std::endl;
+
+    return 0;
+}