【HDU 1228】A + B

#include<stdio.h>
#include<string.h>
char str[1024],letter[10][10]= {"zero","one","two",
"three","four","five","six","seven","eight","nine"};
int flag,a,b,num;
int main()
{
    while(~scanf("%s",str))
    {
        if(strcmp(str,"="))//不为=
        {
            for(int i=0; i<10; i++)
                if(!strcmp(letter[i],str))//为数字i
                {
                    num=i;
                    if(!flag) a=a*10+num;//+前，统计i
                    else b=b*10+num;
                    break;
                }
            if(!strcmp(str,"+")) flag=!flag;//为+
        }
        else
        {
            if(!a&&!b)break;
            printf("%d\n",a+b);
            a=b=0;//不要忘记清零
        }
    }
    return 0;
}