输入输出文法1

最新推荐文章于 2024-02-18 20:39:58 发布

wlllssd

最新推荐文章于 2024-02-18 20:39:58 发布

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分类专栏：编译原理实验陈炬桦 sicily

本文链接：https://blog.youkuaiyun.com/wlllssd/article/details/88327094

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Input

8
E E+T
T T*F
E T
T F
F (E)
F i
E E-T
T T/F

Output

G[E]:
E::=E+T | T | E-T
T::=T*F | F | T/F
F::=(E) | i

#include <iostream>
#include <vector>
#include <string>
#include <map>
using namespace std;
int main(int argc, char const *argv[])
{
	struct  { int Nv;string VN[10];} Vns={3,"E","T","F"};
	struct  { int Nt;string VT[10];} Vts={7,"+","-","*","/","(",")","i"};
	struct  { int Np;string PL[20],PR[20];} ps={0};
	string S="E"; 
	int N;
	cin >> N;
	std::map<string, vector<string> > m;
	while(N--){
		string a;
		string b;
		cin