C++Primer Plus（第六版）第四章编程练习：

#include <iostream>
#include <string>
#include <cstring>
#include <array>
using namespace std;
struct stu
{
	char f_name[15];
	char l_name[15];
	char degree;
	int age;
};

struct Candybar
{
	Candybar():C_logo(),C_weight(),C_car(){};
	string C_logo;
	double C_weight;
	int C_car;
};
struct Pizza
{
	string P_name;
	double d;
	double weight;
};
int main()
{
	/*cout<<"No.1:"<<endl;
	stu stu1;
	cout<<"what is your first name:";
	cin.getline(stu1.f_name,15);
	cout<<"what is your last name:";
	cin.getline(stu1.l_name,15);
	cout<<"what letter grade do you deserve? ";
	cin >>stu1.degree;
	stu1.degree+=1;
	cout<<"what is your age?";
	cin >> stu1.age;
	cout << "Name:"<<stu1.f_name<<" "<<stu1.l_name<<endl;
	cout << "Grade:"<< stu1.degree<<endl;
	cout << "Age:" << stu1.age<<endl;
	system("pause");

	cout << "N0.2:"<<endl;
	cout << "Enter your name:\n";
	string name;
	string dessert;
	cin >> name;
	cout << "Enter your favorate dessert:\n";
	cin >> dessert;
	cout << "I have some deliciuse "<<dessert;
	cout << "for you," << name << "\n";
	system("pause");

	cout << "No.3:"<<endl;
	stu stu2;
	cout << "Enter your first name:";
	cin.getline(stu2.f_name,15);
	cout << "Enter your last name:";
	cin.getline(stu2.l_name,15);
	char combine[30];
	strcpy(combine,stu2.f_name);
    strcat(combine,",");
	strcat(combine,stu2.l_name);
	cout << combine;
	system("pause");

	cout << "No.4:"<<endl;
	cout << "Enter your first name:";
	string stu1,stu2;
	cin >> stu1;
	cout << "Enter your last name:";
	cin >> stu2;
	stu2 = stu2+",";
	stu1 = stu2+ stu1;
	cout << stu1;
	system("pause");
	cout << "No.5:"<<endl;
	Candybar snack = {
		"Mocha Munch",
		2.3,
		350
	};
	cout << snack.C_logo <<endl<<snack.C_weight<<endl<<snack.C_car<<endl;
	system("pause");
	cout << "No.6:"<<endl;
	Candybar Array[3]=
	{
	{"M&m",2.1,250},
	{"Kitkat",2.5,300},
	{"Dove",2.4,350}
	};
	for(int i=0;i<3;i++)
	{
		cout<<"Type"<<i+1<<endl<<Array[i].C_logo<<endl<<Array[i].C_weight<<endl<<Array[i].C_car<<endl;
	}
	system("pause");
	cout << "No.7:"<<endl;
	cout <<"input the information of Pizza:"<<endl;
	Pizza temp;
	cout << "the name:"<<endl;
	cin >> temp.P_name;
	cout << "the diameter:"<< endl;
	cin >> temp.d;
	cout << "the weight:"<<endl;
	cin >> temp.weight;
	cout <<"result is :"<<endl<<temp.P_name<<endl<<temp.d<<endl<<temp.weight<<endl;
	system("pause");
	cout << "No.8:"<<endl;
	cout <<"input the information of Pizza:"<<endl;
	Pizza * temp = new Pizza;
	cout << "the diameter:"<< endl;
	cin >> temp->d;
	cout << "the name:"<<endl;
	cin >> temp->P_name;
	cout << "the weight:"<<endl;
	cin >> temp->weight;
	cout <<"result is :"<<endl<<temp->P_name<<endl<<temp->d<<endl<<temp->weight<<endl;
	system("pause");
	delete temp;
	cout << "No.9:"<<endl;
	Candybar * Array = new Candybar[3];
	Array[0].C_logo = "M&m";
	Array[0].C_weight = 2.1;
	Array[0].C_car = 250;
	Array[1].C_logo = "Kitkat";
	Array[1].C_weight = 2.5;
	Array[1].C_car = 300;
	Array[2].C_logo = "Dove";
	Array[2].C_weight = 2.4;
	Array[2].C_car = 350;
	for(int i=0;i<3;i++)
	{
		cout<<"Type"<<i+1<<endl<<Array[i].C_logo<<endl<<Array[i].C_weight<<endl<<Array[i].C_car<<endl;
	}
	system("pause");
	delete [] Array;
	cout << "No.10:"<<endl;
	array <double,3> ar;
	for(int i = 0;i<3;i++)
	{
		cout << "No."<<i+1<<" grade:";
		cin >> ar.at(i);
	}
	cout<<"average grade:"<<(ar.at(0)+ar.at(1)+ar.at(2))/3<<endl;
	system("pause");*/
	return 0;
}

每个题题号都写在代码里了