mirror of
https://github.com/golang/go
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56 lines
973 B
Go
56 lines
973 B
Go
// $G $F.go && $L $F.$A && ./$A.out
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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// brainfuck
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func main() {
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var a [30000]byte;
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prog := "++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.!";
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p := 0;
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pc := 0;
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for {
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switch prog[pc] {
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case '>':
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p++;
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case '<':
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p--;
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case '+':
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a[p]++;
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case '-':
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a[p]--;
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case '.':
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print string(a[p]);
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case '[':
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if a[p] == 0 {
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for nest := 1; nest > 0; pc++ {
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switch prog[pc+1] {
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case ']':
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nest--;
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case '[':
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nest++;
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}
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}
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}
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case ']':
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if a[p] != 0 {
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for nest := -1; nest < 0; pc-- {
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switch prog[pc-1] {
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case ']':
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nest--;
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case '[':
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nest++;
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}
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}
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}
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default:
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return;
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}
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pc++;
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}
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}
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