一段有趣的C++代码，五次选择猜出你的生日

程序代码：GuessBirthDate.cpp

/**
* 运行程序，做5次选择，就能知道你的生日是哪一天。
*/
#include <iostream>
using namespace std;

int main()
{
int date = 0; // Date to be determind
char answer;

// Prompt the user for Set 1
cout << "Is your birth date in this set ?" << endl;
cout << "16 17 18 19\n" <<
"20 21 22 23\n" <<
"24 25 26 27\n" <<
"28 29 30 31"   << endl;
cout << "Enter N for No and Y for Yes: ";
cin >> answer;

if (answer == 'Y')
date += 16;

// Prompt the user for Set 2
cout << "Is your birth date in this set ?" << endl;
cout << " 8  9 10 11\n" <<
"12 13 14 15\n" <<
"24 25 26 27\n" <<
"28 29 30 31"   << endl;
cout << "Enter N for No and Y for Yes: ";
cin >> answer;

if (answer == 'Y')
date += 8;

// Prompt the user for Set 3
cout << "Is your birth date in this set ?" << endl;
cout << " 1  3  5  7\n" <<
" 9 11 13 15\n" <<
"17 19 21 23\n" <<
"25 27 29 31"   << endl;
cout << "Enter N for No and Y for Yes: ";
cin >> answer;

if (answer == 'Y')
date += 1;

// Prompt the user for Set 4
cout << "Is your birth date in this set ?" << endl;
cout << " 2  3  6  7\n" <<
"10 11 14 15\n" <<
"18 19 22 23\n" <<
"26 27 30 31"   << endl;
cout << "Enter N for No and Y for Yes: ";
cin >> answer;

if (answer == 'Y')
date += 2;

// Prompt the user for Set 5
cout << "Is your birth date in this set ?" << endl;
cout << " 4  5  6  7\n" <<
"12 13 14 15\n" <<
"20 21 22 23\n" <<
"28 29 30 31"   << endl;
cout << "Enter N for No and Y for Yes: ";
cin >> answer;

if (answer == 'Y')
date += 4;

cout << "Your birth date is " << date << endl;

return 0;
}

Is your birth date in Set1?
16 17 18 19
20 21 22 23
24 25 26 27
28 29 30 31
Enter N for No and Y for Yes: N

Is your birth date in Set2?
8  9 10 11
12 13 14 15
24 25 26 27
28 29 30 31
Enter N for No and Y for Yes: Y

Is your birth date in Set3?
1  3  5  7
9 11 13 15
17 19 21 23
25 27 29 31
Enter N for No and Y for Yes: Y

Is your birth date in Set4?
2  3  6  7
10 11 14 15
18 19 22 23
26 27 30 31
Enter N for No and Y for Yes: Y

Is your birth date in Set5?
4  5  6  7
12 13 14 15
20 21 22 23
28 29 30 31
Enter N for No and Y for Yes: N
Your birth date is 11
Press any key to continue