c++ please!

Vectors are useful to process lists.

A top-level domain (TLD) name is the last part of an Internet domain name like .com in example.com. A core generic top-level domain(core gTLD) is a TLD that is either .com, .net, .org, or .info. A restricted top-level domain is a TLD that is either .biz, .name, or .pro. A second-level domain is a single name that precedes a TLD as in apple in apple.com.

The following program repeatedly prompts for a domain name, and indicates whether that domain name consists of a second-level domain followed by a core gTLD. Valid core gTLD's are stored in a vector. For this program, a valid domain name must contain only one period, such as apple.com, but not support.apple.com. The program ends when the user enters -1.

1. Run the program and enter domain names to validate.

2. Extend the program to also recognize restricted TLDs using a vector, and statements to validate against that vector. The program should also report whether the TLD is a core gTLD or a restricted gTLD. Run the program again.

code:

#include #include using namespace std;

int main() { // Define the list of valid core gTLDs const int NUM_ELEMENTS = 4; vector validCoreGtld(NUM_ELEMENTS); // FIXME: Declare a vector named validRestrictedGtld that has the names // of the restricted domains, .biz, .name, and .pro string inputName; string searchName; string theGtld; bool isValidDomainName; bool isCoreGtld; bool isRestrictedGtld; int periodCounter; int periodPosition; unsigned int i;

validCoreGtld.at(0) = ".com"; validCoreGtld.at(1) = ".net"; validCoreGtld.at(2) = ".org"; validCoreGtld.at(3) = ".info";

cout << endl << "Enter the next domain name (-1 to exit): " << endl; cin >> inputName;

while (inputName != "-1") { searchName = inputName; for (i = 0; i < inputName.size(); ++i) { searchName[i] = tolower(inputName[i]); } theGtld = ""; isValidDomainName = false; isCoreGtld = false; isRestrictedGtld = false;

// Count the number of periods in the domain name periodCounter = 0; periodPosition = 0;

for (i = 0; i < searchName.size(); ++i) { if (searchName[i] == '.') { ++periodCounter; periodPosition = i; } }

// If there is exactly one period that is not at the start // or end of searchName, check if the TLD is a core gTLD or a restricted gTLD if ((periodCounter == 1) && (searchName[0] != '.') && (searchName[searchName.size() - 1] != '.')) { isValidDomainName = true; } if (isValidDomainName) { // Extract the Top-level Domain name starting at the period's position. // Ex: If searchName = "example.com", the next statement extracts ".com" theGtld = searchName.substr(periodPosition);

i = 0; while ((i < validCoreGtld.size()) && (!isCoreGtld)) { if(theGtld == validCoreGtld.at(i)) { isCoreGtld = true; } else { ++i; } } // FIXME: Check to see if the gTLD is not a core gTLD. If it is not, // check to see whether the gTLD is a valid restricted gTLD. // If it is, set isRestrictedGtld to true }

cout << "\"" << inputName << "\" "; if (isValidDomainName) { cout << "is a valid domain name and "; if (isCoreGtld) { cout << "has a core gTLD of \"" << theGtld << "\"." << endl; } else if (isRestrictedGtld) { cout << "has a restricted gTLD of \"" << theGtld << "\"." << endl; } else { cout << "does not have a core gTLD." << endl; // FIXME: update message } } else { if (isValidDomainName) { cout << "is a valid domain name and "; if (isCoreGtld) { cout << "has a core gTLD of \"" << theGtld << "\"." << endl; } else if (isRestrictedGtld) { cout << "has a restricted gTLD of \"" << theGtld << "\"." << endl; } else { cout << "does not have a core gTLD." << endl; // FIXME: update message } } else { cout << "is not a valid domain name." << endl; } }

cout << endl << "Enter the next domain name ( to exit): " << endl; cin >> inputName; }

return 0; }