## An interesting code, guess birthday

Transfer from: http: //www.oschina.net/code/snippet_10896_2907

### [Code] GuessBirthDate.cpp

``````/**
* 一段有趣的代码，猜生日。
* 运行程序，做5次选择，就能知道你的生日是哪一天。神奇！
*/
#include <iostream>
using namespace std;
int main()
{
int date = 0; // Date to be determind
// 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: ";
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: ";
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: ";
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: ";
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: ";
date += 4;
cout << "Your birth date is " << date << endl;
return 0;
}``````

### [Code] test my birthday

``````david@xmimx:GuessBirthDate\$ ./GuessBirthDate
Is your birth date in this set ?
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 this set ?
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 this set ?
1  3  5  7
9 11 13 15
17 19 21 23
25 27 29 31
Enter N for No and Y for Yes: N
Is your birth date in this set ?
2  3  6  7
10 11 14 15
18 19 22 23
26 27 30 31
Enter N for No and Y for Yes: N
Is your birth date in this set ?
4  5  6  7
12 13 14 15
20 21 22 23
28 29 30 31
Enter N for No and Y for Yes: Y

Reproduced in: https: //my.oschina.net/dake/blog/196705

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Origin blog.csdn.net/weixin_34008933/article/details/91508300
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