给字符串排序，编译没问题，运行有问题

[angelcm51]

代码如下：

#include <iostream>
#include <string>
using namespace std;
int main(){
	string text;
	const string separators=" ,.\"\n";
	//从键盘录入字符串
	cout<<endl<<"Enter a string terminated by # : "<<endl;
	getline(cin,text,'#');

	size_t start=text.find_first_not_of(separators);
	size_t end=0;
	int word_count=0;

	while(start!=string::npos){
		end=text.find_first_of(separators,start+1);
		if(end==string::npos)
			end=text.length();
			word_count++;
		//找到下一个单词里面第一个字符
		start=text.find_first_not_of(separators,end+1);
	}
	//创建指向单词的指针数组
	string** pwords=new string*[word_count];
	
	//创建单词对象
	start=text.find_first_not_of(separators);
	end=0;
	int index=0;
	while(start!=string::npos){
		end=text.find_first_of(separators,start+1);
		if(end==string::npos)
			end=text.length();
		pwords[index++]=new string(text.substr(start,end-start));
		//找到下一个单词里面第一个字符
		start=text.find_first_not_of(separators,end+1);
	}
	//排序并输出单词
	int lowest=0;
	for(int j=0;j<word_count-1;j++){
		lowest=j;
	//检查光标是否跟随单词
	for(int i=j+i;i<word_count;i++)
		if(*pwords[i]<*pwords[lowest])
			lowest=i;

		if(lowest!=j){
		string* ptemp=pwords[j];
		pwords[j]=pwords[lowest];
		pwords[lowest]=ptemp;
		}
	}
	char ch=(*pwords[0])[0];
	int words_in_line=0;
	for(int i=0;i<word_count;i++){
		if(ch!=(*pwords[i])[0]){
			cout<<endl;
			ch=(*pwords[i])[0];
			words_in_line=0;
		}

		cout<<*pwords[i]<<"  ";
		if(++words_in_line==6){
		cout<<endl;
		words_in_line=0;
		}
	}
	//释放堆区内存
	for(i=0;i<word_count;i++)
		delete pwords[i];

	delete [] pwords;
		return 0;
}

[yyyapple]

i没有初始化0

改了下：

#include <iostream>
#include <string>
using namespace std;
int main(){
    string text;
    const string separators=" ,.\"\n";
    //从键盘录入字符串
    cout<<endl<<"Enter a string terminated by # : "<<endl;
    getline(cin,text,'#');

    size_t start=text.find_first_not_of(separators);
    size_t end=0;
    int word_count=0;

    while(start!=string::npos){
        end=text.find_first_of(separators,start+1);
        if(end==string::npos)
            end=text.length();
            word_count++;
        //找到下一个单词里面第一个字符
        start=text.find_first_not_of(separators,end+1);
    }
    //创建指向单词的指针数组
    string** pwords=new string*[word_count];
    
    //创建单词对象
    start=text.find_first_not_of(separators);
    end=0;
    int index=0;
    while(start!=string::npos){
        end=text.find_first_of(separators,start+1);
        if(end==string::npos)
            end=text.length();
        pwords[index++]=new string(text.substr(start,end-start));
        //找到下一个单词里面第一个字符
        start=text.find_first_not_of(separators,end+1);
    }
    //排序并输出单词
    int lowest=0;
	int i=0;
    for(int j=0;j<word_count-1;j++){
        lowest=j;
    //检查光标是否跟随单词
   i=0;
    for(i=j+i;i<word_count;i++)
        if(*pwords[i]<*pwords[lowest])
            lowest=i;

        if(lowest!=j){
        string* ptemp=pwords[j];
        pwords[j]=pwords[lowest];
        pwords[lowest]=ptemp;
        }
    }
    char ch=(*pwords[0])[0];
    int words_in_line=0;
    for(i=0;i<word_count;i++){
        if(ch!=(*pwords[i])[0]){
            cout<<endl;
            ch=(*pwords[i])[0];
            words_in_line=0;
        }

        cout<<*pwords[i]<<"  ";
        if(++words_in_line==6){
        cout<<endl;
        words_in_line=0;
        }
    }
    //释放堆区内存
    for(i=0;i<word_count;i++)
        delete pwords[i];

    delete [] pwords;

	getchar();
        return 0;
}