编译基础学习知识原理实验词法语法分析附源代码

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{ //WordAnalyse(); termdo(); }

if(sym!=times&&sym!=slash&&sym!=plus&&sym!=minus&&sym!=ident&&sym!=number&&sym!=lparen&&sym!=rparen) { err++; if(err==1) printf(\语法错误: \\n\ printf(\不能识别字符\\n\ }

while ((sym == plus) || (sym == minus)) { WordAnalyse(); if(getsym()==-1) { err++; if(err==1) printf(\语法错误: \\n\ printf(\ 后缺项\\n\ return -1; } termdo(); }

return 0; }

int main(int argc, char* argv[]) {

init(); err=0;

ifstream fin(\ ofstream fout(\ ch=' '; lp=0;

getsymdo; expression();

if(err==0) cout<<\语法正确\ else cout<<\语法错误，错误个数： \

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}