pku 1583 Choose Your Words Carefully

这题是不区分大小写的

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <string>
#include <map>
#include <iostream>

 

using namespace std;

 

#define WLEN 85

string in;
map<string,int> text;

 

char buf[WLEN];

 

int main()
{
    char ch;
    int i,j,t,max=0;
    while( (ch=getchar()) !=EOF )
    {
        i=0;
        while( ch!=EOF && !isalpha(ch) && (ch=getchar()) ) ;
        buf[i++]=ch;
        while( ch!=EOF && (ch=getchar() )!=EOF && isalpha(ch) )
        {
            if(ch==EOF) break;
            buf[i++]=ch;
        }
        buf[i]=0;
        for(j=0;j<i;j++)
            if(buf[j]>='A' && buf[j]<='Z')
                buf[j]+=32;
        in.assign(buf);
        t=++text[buf];
        if(t>max) max=t;
       if(ch==EOF) break;
    }
    cout<<max<<" occurrences"<<endl;
    map<string,int>::const_iterator iter;
    for(iter=text.begin();iter!=text.end();iter++)
    {
        if(iter->second==max)
            cout<<iter->first<<endl;
    }

    return 0;
}