$ grep isalpha reader.c > if (isalpha(c)) > if (isalpha(c)) > if (!isalpha(c) && c != '_' && c != '$') > if (isalpha(c) || c == '_' || c == '.' || c == '$') > else if (c == '\n' || isalpha(c) || !isspace(c)) > if (isalpha(c) || c == '_' || c == '.' || c == '$') > if (!isalpha(c) && c != '_' && c != '.' && c != '$') > if (!isalpha(c) && c != '_' && c != '.' && c != '_') // 問題の行 > if (isalpha(c) || c == '_' || c == '$') > if (isalpha(c) || c == '_' || c == '.' || c == '$') > if (isalpha(c) || c == '_' || c == '.' || c == '$' || c == '\'' ||