tinclude using namespace std; int main() char ansi int num: // Initialization SQut « sndl << "Do you want to add a number? (y // n)" << gndli while ((ans - 'y') II (ans =- 'Y')) SOUT <« "Enter number to be added: " <« gndl, SAn >> num; Cout, << "The addition of " « num << " is " « num + num << endl; // Update SOut, <« sndl, <« "Do you want to add another number? (y/n)" « sndl; return 0; 1.Modify the program to change the || to &&. What is the result? Why? Change it back after you have answered the question? 2. Comment out the two lines after the "Initialization" label (comment). What happened? L.e., is there an error? If so, why? Restore the lines, or un-comment, by removing the // after you have answered the question. 3.Comment out the two lines after the "Update" label (comment). What happens and why? Un- comment the lines after you have answered the question.

C++ PLEASE!!       // FILE: simplestring.h// CLASS PROVIDED: string (a sequence of characters)//// CONSTRUCTOR for the string class:// string(const char str[ ] = "") -- default argument is the empty string.// Precondition: str is an ordinary null-terminated string.// Postcondition: The string contains the sequence of chars from str.//// CONSTANT MEMBER FUNCTIONS for the string class:// size_t length( ) const// Postcondition: The return value is the number of characters in the// string.//// char operator [ ](size_t position) const// Precondition: position < length( ).// Postcondition: The value returned is the character at the specified// position of the string. A string's positions start from 0 at the start// of the sequence and go up to length( )-1 at the right end.//// MODIFICATION MEMBER FUNCTIONS for the string class:// void operator +=(const string& addend)// Postcondition: addend has been catenated to the end of the string.//// void operator +=(const char addend[ ])//…

#include <iostream>#include <sstream>#include <string>using namespace std; int main() {   string userItem;   ostringstream itemsOSS;    cout << "Enter items (type Exit to quit):" << endl;   cin >> userItem;    while (userItem != "Exit") {            cin >> userItem;   }    cout << itemsOSS.str() << endl;    return 0;}

#include <iostream> using namespace std; int main() {       int num = 1;        while (num < 30)       {                cout << num << “  “;                 num = num + 5;                 } } The fourth number displayed is ______