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// ex6.4
// 希望回头想到好办法
#include <iostream>
using namespace std;
const int strsize = 20; // 20 或许有点小
const int NUM = 5;
void showmenu();
// Benevolent Order of Programmers name structure
struct bop {char fullname[strsize]; // real namechar title[strsize];    // job titlechar bopname[strsize];  // secret BOP nameint preference;         // 0 = fullname, 1 = title, 2 = bopname
};int main ()
{// 除了书上贴出来的信息，其他瞎编bop bops[NUM] = {{"Wimp Macho", "Farmer", "Wim", 0},{"Raki Rhodes", "Junior Programmer", "Rak", 1},{"Celia Laiter", "Driver", "MIPS", 2},{"Hoppy Hipman", "Analyst Trainee", "Hop", 1},{"Pat Hand", "Teacher", "LOOPY", 2}};showmenu();char ch; // choicecout << "Enter your choice: ";int i;   // 不重复声明了// 这个写的复杂了，希望能想出好办法while (cin >> ch && ch != 'q'){switch (ch){case 'a': for (i = 0; i < NUM; i++)cout << bops[i].fullname << endl;break;case 'b': for (i = 0; i < NUM; i++)cout << bops[i].title << endl;break;case 'c': for (i = 0; i < NUM; i++)cout << bops[i].bopname << endl;break;case 'd': for (i = 0; i < NUM; i++){switch (bops[i].preference){case 0: cout << bops[i].fullname << endl; break;case 1: cout << bops[i].title << endl; break;default: cout << bops[i].bopname << endl;}}break;default: break;}// 吞掉后面多挂的字符while ((ch = cin.get()) != '\n')continue;cout << "Next choice: ";}cout << "Bye!\n";return 0;
}void showmenu()
{cout << "Benevolent Order of Programmers Report\n""a. display by name     b. display by title\n""c. display by bopname  d. display by preference\n""q. quit\n";return;
}