设有一个已经排序的英文词典文档，每个词条的格式为： 词条/词性/例句 例如： book/n./This is a book. Student/n./I am a student. Teacher/n.

设有一个已经排序的英文词典文档，每个词条的格式为： 词条/词性/例句 

例如： book/n./This is a book. 

           Student/n./I am a student. 

           Teacher/n./I am a teacher. 

试编写一个程序，根据二凡查找的原理，在文件中查找指定单词的词条，并输出词条信息.

#include<iostream>
#include<cstring>
using namespace std;
const int N = 100;
typedef struct word{//词典结构体
	char Entry[N];//词条
	char nature[N];//词性
	char example[N];//例句
};
void findWord(word w[], char s[], int start, int end){
	int low = start, high = end;
	while (low < high){
		int mid = (low + high) / 2;
		if (!strcmp(w[mid].Entry, s)){
			cout << w[mid].Entry << " " << w[mid].nature << " " << w[mid].example;
			return;
		}
		else if (strcmp(w[mid].Entry, s) > 0){
			high = mid - 1;
		}
		else{
			low = mid + 1;
		}
	}
}
int init(word w[], FILE *fp){//从文件中读入资源到词典，返回值为词典长度
	char ch = fgetc(fp);
	int lengthW = 0;//词典长度
	int j = 0;
	while (ch != EOF){
		while(ch!='/'&&ch!=EOF){
			w[lengthW].Entry[j++] = ch;
			ch = fgetc(fp);
		}
		ch = fgetc(fp);
		w[lengthW].Entry[j] = '\0';
		j = 0;
		while (ch != '/'&&ch != EOF){
			w[lengthW].nature[j++] = ch;
			ch = fgetc(fp);
		}
		ch = fgetc(fp);
		w[lengthW].nature[j++] = '\0';
		j = 0;
		while (ch != '\n'&&ch != EOF){
			w[lengthW].example[j++] = ch;
			ch = fgetc(fp);
		}
		ch = fgetc(fp);
		w[lengthW].example[j] = '\0';
		j = 0;
		lengthW++;
	}
	return lengthW;
}
void print(word w[], int n){//输出测试函数
	for (int i = 0; i < n; i++){
		cout << w[i].Entry <<" "<< w[i].nature <<" "<< w[i].example<<endl;
	}
}
int main(){
	FILE *fp; 
	if ((fp = fopen("F:\\Text.txt", "r")) == NULL){
		printf("cannot open this file\n");
		exit(0);
	}
	else{
		cout << "succ"<<endl;
	}
	word w[N];//创建一个词典
	int n = init(w, fp);//初始化词典
	print(w, n);
	cout << "find result : ";
	findWord(w, "Student",0,n - 1);//寻找学生.
	fclose(fp);//关闭文件
	system("pause");
	return 0;
}