编译原理词法语法语义分析器设计(16)
时间：2025-04-29
} 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';
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