二進制練習小遊戲

　　今天惡補彙編，發現腦殼變遲鈍了，因此寫了個小程序，練習一下二進制轉換，鞏固記憶~~

　　先來看看二進制（Binary）、十進制（Decimal）、十六進制（Hexadecimal）的關係表格

 

Decimal (base 10)	Binary (base 2)	Hexadecimal (base 16)
0	0000	0
1	0001	1
2	0010	2
3	0011	3
4	0100	4
5	0101	5
6	0110	6
7	0111	7
8	1000	8
9	1001	9
10	1010	A
11	1011	B
12	1100	C
13	1101	D
14	1110	E
15	1111	F

　　根據對應關係，寫了以下小代碼，亦能夠統計成功率

　　

 1 #include <iostream>
 2 #include <ctime>
 3 #include <cstdlib>
 4 #include <string>
 5 #include <bitset>
 6 #include <iomanip>
 7 
 8 using namespace std;
 9 
10 int main(int argc, char *argv[])
11 {
12     cout << "You must enter a 4-digit binary number." << endl;
13     cout << "If you enter 'q' or 'Q', then the game over~"<< endl;
14     cout << "Now, let's start the game!" << endl;
15     cout << endl;
16 
17     unsigned long correctCount = 0;
18     unsigned long totalCount = 0;
19     srand(time(NULL));
20     do{
21         unsigned long v = rand() % 16;
22         if(0 == (rand() - (v >> 1)) % 2){
23             cout << "0x" << hex << uppercase << v << " = " << resetiosflags(ios_base::hex | ios_base::uppercase);
24         }else{
25             cout << v << " = ";
26         }
27 
28         string str;
29         cin >> str;
30 
31         if(0 == str.compare("q") || 0 == str.compare("Q")){
32             cout << endl;
33             break;
34         }
35 
36         if(str.size() > 4){
37             cout << "Please enter a valid 4-digit binary number" << endl;
38         }else{
39             try{
40                 bitset<4> foo(str);
41 
42                 totalCount++;
43                 if(foo.to_ulong() == v){
44                         correctCount++;
45                     cout << "^_-! Bingo!" << endl;
46                 }else
47                     cout << "-_-! Once again!" << endl;
48             }catch(...){
49                 cout << "Please enter the binary format!" << endl;
50             }
51         }
52 
53         cout << endl;
54     }while(1);
55 
56     if(totalCount > 0)
57         cout << "Correct Rate: " << correctCount / double(totalCount) * 100 << "%" << endl;
58 
59     cout << "Bye-bye ^_^!" << endl;
60     return 0;
61 }