This is a brainfuck interpreter based on React Native for iOS & android. 中文页面
More features are going to be designed and implemented.
Brainfuck is an esoteric programming language created in 1993 by Urban Müller, and notable for its extreme minimalism.
The eight language commands each consist of a single character:
| Character | Meaning |
|---|---|
> |
increment the data pointer (to point to the next cell to the right). |
< |
decrement the data pointer (to point to the next cell to the left). |
+ |
increment (increase by one) the byte at the data pointer. |
- |
decrement (decrease by one) the byte at the data pointer. |
. |
output the byte at the data pointer. |
, |
accept one byte of input, storing its value in the byte at the data pointer. |
[ |
if the byte at the data pointer is zero, then instead of moving the instruction pointer forward to the next command, jump it forward to the command after the matching ] command. |
] |
if the byte at the data pointer is nonzero, then instead of moving the instruction pointer forward to the next command, jump it back to the command after the matching [ command. |
The following program prints "Hello World!" and a newline to the screen:
++++++++ Set Cell #0 to 8
[
>++++ Add 4 to Cell #1; this will always set Cell #1 to 4
[ as the cell will be cleared by the loop
>++ Add 2 to Cell #2
>+++ Add 3 to Cell #3
>+++ Add 3 to Cell #4
>+ Add 1 to Cell #5
<<<<- Decrement the loop counter in Cell #1
] Loop till Cell #1 is zero; number of iterations is 4
>+ Add 1 to Cell #2
>+ Add 1 to Cell #3
>- Subtract 1 from Cell #4
>>+ Add 1 to Cell #6
[<] Move back to the first zero cell you find; this will
be Cell #1 which was cleared by the previous loop
<- Decrement the loop Counter in Cell #0
] Loop till Cell #0 is zero; number of iterations is 8
>>. Cell #2 has value 72 which is 'H'
>---. Subtract 3 from Cell #3 to get 101 which is 'e'
+++++++..+++. Likewise for 'llo' from Cell #3
>>. Cell #5 is 32 for the space
<-. Subtract 1 from Cell #4 for 87 to give a 'W'
<. Cell #3 was set to 'o' from the end of 'Hello'
+++.------.--------. Cell #3 for 'rl' and 'd'
>>+. Add 1 to Cell #5 gives us an exclamation point
>++. And finally a newline from Cell #6Reference: Wikipedia