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Generate token parser code with lex:\n\n```bash\nlex pikachu.l\n```\n\nYou'll get `lex.yy.c`.\n\n2. Generate grammar parser code with yacc:\n\n```bash\nyacc -d pikachu.y\n```\n\nYou'll get `y.tab.c` and `y.tab.h`.\n\n3. Compile:\n\n```bash\ngcc y.tab.c lex.yy.c -ly -o pikachu\n```\n\n4. Test:\n\n```bash\n./pikachu \u003c test-helloworld.txt\n```\n\nYou should get the output `Hello World!`.\n\n```bash\n./pikachu \u003c test-pikachu.txt\n```\n\nYou should be able to get:\n\n![Pikachu.png](pikachu.png)\n\n## Code\n\nCode your program on Brainfuck, transform `\u003c` with `pi`, `\u003e` with `chu`, `+` with `ka`, and keep the other characters not changed.\n\nThen you master the programming language `pikachu`.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Finokinoki%2Fpikachu","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Finokinoki%2Fpikachu","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Finokinoki%2Fpikachu/lists"}