编译原理词法语法语义分析器设计(14)

status = 1; break; } }

if (status == 0) {

flag = 100; //标识符（） } }

else if ((ch >= '0') && (ch <= '9')) //数字（） {

number = 0;

while ((ch >= '0' ) && (ch <= '9' )) {

number = number*10+(ch-'0'); ch = program[i++]; }

flag = 200; i--; }

else switch (ch) //运算符和标点符号 {

case '=':{ if (ch == '=') words[j++] = ch; words[j] = '\0'; ch = program[i++]; if (ch == '=') {

words[j++] = ch; words[j] = '\0'; flag = 401; } else { i--; flag = 402; } break; }

case'>':{

if (ch == '>') words[j++] = ch;