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【C++ Primer Plus习题】6.4

article 2025/3/4 1:26:00

问题:

解答:

#include <iostream>
using namespace std;

const int strsize = 40;
const int usersize = 40;

typedef struct _Bop
{
	char fullname[strsize];
	char title[strsize];
	char bopname[strsize];
	int preference;
}Bop;

Bop bop_user[usersize] =
{
	{"Wimp Macho","Programmer","MIPS",0},
	{"Raki Rhodes","Junior Programmer","",1},
	{"Celia Laiter","","MIPS",2},
	{"Hoppy Hipman","Analyst Trainee","",1},
	{"Pat Hand","","LOOPY",2}
};

void showmenu();
void print_by_name();
void print_by_pref();
void print_by_title();
void print_by_bopname();

int main()
{
	char choice;
	showmenu();
	cin.get(choice);
	while (choice!='q')
	{
		switch (choice)
		{
		case 'a':
			print_by_name();
			break;
		case 'b':
			print_by_title();
			break;
		case 'c':
			print_by_bopname();
			break;
		case 'd':
			print_by_pref();
			break;
		default:
			cout << "请输入a,b,c,d or q" << endl;
		}
		cin.get();
		cout << "下一次输入:";
		cin.get(choice);
	}
	cout << "Bye!" << endl;
	return 0;
}


void showmenu()
{
	cout << "a.display by name\t\tb.display by title" << endl;
	cout << "c.display by bopname\t\td.display by preference" << endl;
	cout << "q.quit"<<endl;
}
void print_by_name()
{
	for (int i = 0; i < usersize; i++)
	{
		if (strlen(bop_user[i].fullname) == 0)
		{
			break;
		}
		else
		{
			cout << bop_user[i].fullname << endl;
		}
	}
}
void print_by_pref()
{
	for (int i = 0; i < usersize; i++)
	{
		if (strlen(bop_user[i].fullname) == 0)
		{
			break;
		}
		else
		{
			switch (bop_user[i].preference)
			{
			case 0:
				cout << bop_user[i].fullname << endl;
				break;
			case 1:
				cout << bop_user[i].title << endl;
				break;
			case 2:
				cout << bop_user[i].bopname << endl;
				break;
			}
		}
	}
}

void print_by_title()
{
	for (int i = 0; i < usersize; i++)
	{
		if (strlen(bop_user[i].fullname) == 0)
		{
			break;
		}
		else
		{
			cout << bop_user[i].title << endl;
		}
	}
}
void print_by_bopname()
{
	for (int i = 0; i < usersize; i++)
	{
		if (strlen(bop_user[i].fullname) == 0)
		{
			break;
		}
		else
		{
			cout << bop_user[i].bopname << endl;
		}
	}
}