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怎么老是wa啊,我实在找不出错误了。。大牛们帮帮忙

Posted by Christole at 2009-07-31 13:05:41 on Problem 1598
#include <iostream> 
#include <string> 
#include <sstream> 
using namespace std; 
#define maxSize 71
struct excuse{
	//string sentence;
	char sentence[maxSize];
	int num;		//used to record the number of keywords included in the sentence
};
string keyword[21];
struct excuse ex[21];
int main() 
{ 
	int k,e;	//k denotes number of keywords and e denotes number of excuse
	int count=0;	//count num of test cases
	while(cin>>k>>e){
		count++;
		//每次进来之时num必须归0
		for (int y=0;y<e;y++){
			ex[y].num=0;
			ex[y].sentence[0]='\0';
		}
		for (int i=0;i<k;i++)
			cin>>keyword[i];
		fflush(stdin);
		//int k=2,e=2;
		for (int j=0;j<e;j++){
			string re,w;		//
			//getline(cin,ex[j].sentence);//string类的getline用法,从流中读到s。可将整个行的输入保存到s里
			//string s=ex[j].sentence;
			char s[maxSize];
			//getline(cin,s);
			gets(s);
			fflush(stdin);
			//ex[j].sentence=s;
		//	for (int x=0;s[x];x++)
		//		ex[j].sentence[x]=s[x];
			strcpy(ex[j].sentence,s);
			istringstream stream(s); // istringstream型变量初始化用string 
			while(stream >> w) {	//istringstream型变量可输出到string
				//convert w to lower case and we must control the word to a zimu only
				string temp;
				for (int t=0;t<w.length();t++)
					if ('A'<=w[t]&&w[t]<='Z')
						temp+=w[t]+32;
					else if ('a'<=w[t]&&w[t]<='z')
						temp+=w[t];
					//else //delete the letter
					//	w.erase(w[t]);
				for (int q=0;q<k;q++)
					if (temp==keyword[q])
						ex[j].num++;
						//test if w is a keyword
			} 
		
		}
		cout<<"Excuse Set #"<<count<<endl;
		int max=0;
		for (int p=1;p<e;p++)
			if (ex[p].num>ex[max].num)
				max=p;
		//cout<<ex[max].sentence<<endl;
		for (int m=0;m<e;m++)
			if (ex[m].num==ex[max].num)
				cout<<ex[m].sentence<<endl;
		cout<<endl;
		//	cout<<re<<endl;
	}
	return 0;
}

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