Application Example of a bitset Template

In the standard template library of C ++, a set of template classes for operating binary bits are provided, which makes the operation bits quite convenient and also facilitates binary operations.

The following is an example of using a function:

# Include <iostream> <br/> # include <bitset> <br/> # include <stdio. h> <br/> int main () <br/>{< br/> STD: String S ("01001"); <br/> STD :: bitset <5> B (s); <br/> STD: bitset <5> B1 (5 ); <br/> // test bitset count function <br/> STD: cout <"bitset B. count = "<B. count () <STD: Endl; <br/> // test bitset operator [] size () <br/> for (INT I = 0; I <B. size (); ++ I) <br/> STD: cout <B [I] <STD: Endl; <br/> // test bitset any () function <br/> STD: cout <"B. any () = "<B. any () <STD: Endl; <br/> // test bitset flip () function <br/> STD: cout <"B. flip = "<B. flip (2) <STD: Endl; <br/> STD: cout <"B. flip = "<B. flip () <STD: Endl; <br/> // test bitset none () function <br/> STD: cout <"B. none = "<B. none () <STD: Endl; <br/> // test bitset reset function <br/> STD: cout <"B. reset = "<B. reset (2) <STD: Endl; <br/> STD: cout <"B. reset = "<B. reset () <STD: Endl; <br/> STD: cout <"B. flip = "<B. flip () <STD: Endl; <br/> // test bitset test function <br/> for (INT I = 0; I <B. size (); ++ I) <br/> STD: cout <"B. test = "<B. test (I) <STD: Endl; <br/> // test bitset to_sting () to_ulong () function <br/> STD: cout <"B. to_string () = "<B. to_string () <STD: Endl; <br/> STD: cout <"b1.to _ ulong () =" <b1.to _ ulong () <STD :: endl; <br/> return 0; <br/>}5, 1 top <br/>

The execution result is as follows:

Bitset B. Count = 2
1
0
0
1
0
B. Any () = 1
B. Flip = 01101.
B. Flip = 10010.
B. None = 0
B. Reset = 10010.
B. Reset = 00000.
B. Flip = 11111.
B. test = 1
B. test = 1
B. test = 1
B. test = 1
B. test = 1
B. to_string () = 11111
B1.to _ ulong () = 5
The following describes the functions:

1. Constructor

Bitset <5> OBJ (5); construct a template instance with a single digit of 5 and a numerical value of 10 to 5.

Bitset <5> strobj (string ("01001"); uses a string to construct a template instance.

2. Count Function

Returns the number of set bits.

3. OPERATOR []

The value corresponding to each single digit is generally 0 or 1.

4. Any Function

Whether all digits are set

5. Flip

Returns the inverse value of the corresponding bitwise value 0 --> 1 1 --> 0.

Flip () indicates the inverse of all digits.

Flip (2) indicates the inverse of the second digit.

6. Reset

Reset () indicates resetting all values

Reset (2) indicates a second reset.

7. None

Not set either.

8. Test

Test (n) checks whether the nth bit has been set

9. Size

Returns the number of digits of the instance.

10. Set

Set (n, 0) to 0

11. to_string

Convert to string

12. to_ulong

Convert to unsigned long integer

 

This is very effective in operating binary data.

 

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