c++ primer plus第四章编程答案

//4.13 编程练习1

#include <iostream>
using namespace std;
int main()
{
   
    char Firstname[20] ;
    char Lastname[20];
    char grade;
    int age;
  
    cout << "What is your first name?";
    cin.getline(Firstname,20);
    cout << "What is your last name?";
    cin.getline(Lastname,20);
    cout << "What letter grade do you deserve?";
    cin >> grade;
    cout << "What is your age?";
    cin >> age;
    cout << "Name: " << Lastname << " , "
    << Firstname <<endl;
    cout << "grade: " << char (grade +1) << endl;
    cout << "Age: " << age <<endl;
    
     return 0;

}

//4.13 编程练习2

#include <iostream>
#include <string>
using namespace std;
int main()
{
   
    string name;
    string dessert;
    cout << "Enter your name:\n";
    getline(cin,name);
    cout << "Enter your favorite dessert:\n";
    getline(cin,dessert);
    cout << "I have some delicious " << dessert;
    cout <<" for you , " << name << endl;
    
    return 0;
 }

//4.13 编程练习3

#include <iostream>
#include <cstring>

using namespace std;
const int SIZE = 20;

int main()
{
   
    char First_name[SIZE];
    cha