Update GenerateRandomString.cpp

GenerateRandomString.cpp

@@ -1,15 +1,19 @@
 #include <iostream>
-#include <cstdlib> 
+#include <cstdlib>
 #include <ctime>
 #include <string>
 
-using namespace std;
+// Function to generate a random string of a specified length
+std::string generateRandomString(int length) {
+    const std::string characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                                  "abcdefghijklmnopqrstuvwxyz"
+                                  "0123456789";
+    std::string randomString;
 
-string generateRandomString(int length) {
-    const string characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                              "abcdefghijklmnopqrstuvwxyz"
-                              "0123456789";
-    string randomString;
+    // Check for valid input
+    if (length <= 0) {
+        throw std::invalid_argument("Length should be a positive integer.");
+    }
 
     // Generate random characters
     for (int i = 0; i < length; ++i) {
@@ -24,21 +28,29 @@ int main() {
     int length;
 
     // Seed the random number generator
-    srand(static_cast<unsigned int>(time(0)));
+    std::srand(static_cast<unsigned int>(std::time(0)));
 
     // Take input for the length of the random string
-    cout << "Enter the length of the random string: ";
-    cin >> length;
+    std::cout << "Enter the length of the random string: ";
+    if (!(std::cin >> length)) {
+        std::cerr << "Invalid input. Please enter a positive integer." << std::endl;
+        return 1;
+    }
 
     // Check for valid input
     if (length <= 0) {
-        cout << "Length should be a positive integer." << endl;
+        std::cerr << "Length should be a positive integer." << std::endl;
         return 1;
     }
 
-    // Generate and display the random string
-    string randomString = generateRandomString(length);
-    cout << "Random String: " << randomString << endl;
+    try {
+        // Generate and display the random string
+        std::string randomString = generateRandomString(length);
+        std::cout << "Random String: " << randomString << std::endl;
+    } catch (const std::exception& e) {
+        std::cerr << "Error: " << e.what() << std::endl;
+        return 1;
+    }
 
     return 0;
 }