Execute Brain**** is an implementation of Brainf***.
Other implementations of Brainf***.
RCBF is a set of Brainf*** compilers and interpreters written for Rosetta Code in a variety of languages.

Below are links to each of the versions of RCBF.

An implementation need only properly implement the following instructions:



Command

Description


 > 
 Move the pointer to the right


 < 
 Move the pointer to the left


 + 
 Increment the memory cell under the pointer


 - 
 Decrement the memory cell under the pointer


 . 
 Output the character signified by the cell at the pointer


 , 
 Input a character and store it in the cell at the pointer


 [ 
 Jump past the matching ] if the cell under the pointer is 0


 ] 
 Jump back to the matching [ if the cell under the pointer is nonzero

Any cell size is allowed,   EOF   (End-O-File)   support is optional, as is whether you have bounded or unbounded memory.




package main
 
import "fmt"
 
func main() {
    // example program is current Brain**** solution to
    // Hello world/Text task.  only requires 10 bytes of data store!
    bf(10, `++++++++++[>+>+++>++++>+++++++>++++++++>+++++++++>++
++++++++>+++++++++++>++++++++++++<<<<<<<<<-]>>>>+.>>>
>+..<.<++++++++.>>>+.<<+.<<<<++++.<++.>>>+++++++.>>>.+++.
<+++++++.--------.<<<<<+.<+++.---.`)
}
 
func bf(dLen int, is string) {
    ds := make([]byte, dLen) // data store
    var dp int               // data pointer
    for ip := 0; ip < len(is); ip++ {
        switch is[ip] {
        case '>':
            dp++
        case '<':
            dp--
        case '+':
            ds[dp]++
        case '-':
            ds[dp]--
        case '.':
            fmt.Printf("%c", ds[dp])
        case ',':
            fmt.Scanf("%c", &ds[dp])
        case '[':
            if ds[dp] == 0 {
                for nc := 1; nc > 0; {
                    ip++
                    if is[ip] == '[' {
                        nc++
                    } else if is[ip] == ']' {
                        nc--
                    }
                }
            }
        case ']':
            if ds[dp] != 0 {
                for nc := 1; nc > 0; {
                    ip--
                    if is[ip] == ']' {
                        nc++
                    } else if is[ip] == '[' {
                        nc--
                    }
                }
            }
        }
    }
}