第四章 复合类型
1，编写一个C++程序，输出如下：
What is your first name? Betty Sue
What is your last name? Yewe
What letter grade do you deserve? B
What is your age? 22
Name: Yewe, Betty Sue
Grade: C
Age: 22
程序将向下调整程序

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

2，修改程序清单4.4，使用C++string类而不是char数组。

#include<iostream>
#include<string>
#include<cstring>
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<<".\n";
	return 0;
 }