实验一词法分析器的设计(6)
时间：2026-01-17
words[j] = '\0';
flag = 407;
}
else
{
i--;
flag = 408;
}
break;
}
case'+':{
if (ch == '+')
words[j++] = ch;
words[j] = '\0';
ch = program[i++]; if (ch == '=')
{
words[j++] = ch;
words[j] = '\0';
flag = 409;
}
else if (ch == '+')
{
words[j++] = ch;
words[j] = '\0';
flag = 410;
}
else
{
i--;
flag = 411;
}
break;
}
case'-':{
if (ch == '-')
words[j++] = ch;
words[j] = '\0';
ch = program[i++]; if (ch == '=')
{
words[j++] = ch;
words[j] = '\0';
flag = 412;
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