字符串处理,Poj(2121)

题目链接：http://poj.org/problem?id=2121

差一点就WA哭了，主要是自己傻逼了。

思路：

遇到hundred，sum*100;

但是遇到thouthend,million,ans+=sum*(... ...),sum=0;

因为到了thouthend,million，后面肯定又是新的数字，跟前面的没关系了，sum=0;

而hundred,后面是可以再加数的，比如22，所以这里只要sum*=100;

注意：

这里经典的一招，杰哥教我的，要重置一下order,只需要order[k]='/0';

而不需要memset了。

#include <stdio.h>
#include <iostream>
#include <string.h>

using namespace std;

char str[];

int main()
{
    while(gets(str))
    {
        //printf("%s",str);
        if(strcmp(str,"")==)
            break;
        bool flag = false;
        int ans=;
        int sum=;
        char order[]={'\0'};
        int k=;
        for(int i=;i<strlen(str)+;i++)
        {
            if(str[i]!=' '&&str[i]!='\0')
                order[k++] = str[i];
            else{
                order[k] = '\0';
                k=;
                if(!strcmp(order,"negative")) flag = true;
                if(!strcmp(order,"zero")) sum+=;
                if(!strcmp(order,"one")) sum+=;
                if(!strcmp(order,"two")) sum+=;
                if(!strcmp(order,"three")) sum+=;
                if(!strcmp(order,"four")) sum+=;
                if(!strcmp(order,"five")) sum+=;
                if(!strcmp(order,"six")) sum+=;
                if(!strcmp(order,"seven")) sum+=;
                if(!strcmp(order,"eight")) sum+=;
                if(!strcmp(order,"nine")) sum+=;
                if(!strcmp(order,"ten")) sum+=;
                if(!strcmp(order,"eleven")) sum+=;
                if(!strcmp(order,"twelve")) sum+=;
                if(!strcmp(order,"thirteen")) sum+=;
                if(!strcmp(order,"fourteen")) sum+=;
                if(!strcmp(order,"fifteen")) sum+=;
                if(!strcmp(order,"sixteen")) sum+=;
                if(!strcmp(order,"seventeen")) sum+=;
                if(!strcmp(order,"eighteen")) sum+=;
                if(!strcmp(order,"nineteen")) sum+=;
                if(!strcmp(order,"twenty")) sum+=;
                if(!strcmp(order,"thirty")) sum+=;
                if(!strcmp(order,"forty")) sum+=;
                if(!strcmp(order,"fifty")) sum+=;
                if(!strcmp(order,"sixty")) sum+=;
                if(!strcmp(order,"seventy")) sum+=;
                if(!strcmp(order,"eighty")) sum+=;
                if(!strcmp(order,"ninety")) sum+=;
                if(!strcmp(order,"hundred"))
                {
                    sum=sum*;
                }
                if(!strcmp(order,"thousand"))
                {
                    ans = ans+sum * ;
                    sum = ;
                }
                if(!strcmp(order,"million"))
                {
                    ans =ans+sum *;
                    sum = ;
                }
            }
        }

        if(flag)
            printf("-%d\n",ans+sum);
        else printf("%d\n",ans+sum);
    }
    return ;
}