>477ですが、ちなみに今度はこんなエラーです
tin.c: 関数 `main' 内:
tin.c:12: error: too few arguments to function `fgets'
tin.c:14: error: too few arguments to function `fgets'
tin.c:16: error: `gcc' undeclared (first use in this function)
tin.c:16: error: (Each undeclared identifier is reported only once
tin.c:16: error: for each function it appears in.)
tin.c:16: error: 文法エラー before "for"
tin.c:16: error: 文法エラー before ')' token
tin.c: トップレベル:
tin.c:20: error: 文法エラー before string constant
tin.c:20: 警告: conflicting types for built-in function `printf'
tin.c:20: 警告: data definition has no type or storage class