uva 10815 - Andy's First Dictionary

#include<iostream>

#include<cctype>

#include<cstdlib>

#include<cstdio>

#include<cstring>

using namespace std;



char word[5001*201][201];



int cmp(const void *a,const void *b){

    return strcmp((char*)a , (char *)b);

}



int main(){

    char ch;

    int i = 0,j = 0;

    while((ch = getchar()) != EOF){

        if(isalpha(ch)){

            word[i][j++] = tolower(ch);

        }

        if(!isalpha(ch) && isalpha(word[i][0])){     //控制条件比较精妙

            word[i++][j] = '\0';

            j = 0;

        }

    }

    qsort(word,i,sizeof(word[0]),cmp);

    puts(word[0]);

    for(int k = 1; k < i; k++){

        if(strcmp(word[k-1],word[k]))

            puts(word[k]);

    }



    return 0;

}