POJ 2273

算是进制转换吧

#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
int main()
{
    char s[30];
    while(gets(s)&&strcmp(s,"R0C0")!=0)
    {
        int m=0,i;
        for(i=1;s[i]!='C';i++);
        s[i]='\0';
        for(++i;s[i]!='\0';i++)
            m=m*10+s[i]-'0';
        char ans[30];
        m--;
        for(i=0;m>=0;i++)
        {
            ans[i]=m%26+'A';
            m=m/26-1;
        }
        ans[i]='\0';
        reverse(ans,ans+i);
        printf("%s%s\n",ans,s+1);
    }
    return 0;
}