题解 | #[NOIP2008]ISBN号码#

#include <stdio.h>

int main()
{
    char ch[14] = { 0 };
    scanf("%s", ch);
    int i = 0;
    int m = 0;
    int sum = 0;
    for (i = 0; ch[i] != '\0'; i++)
    {
        if (ch[i] != '-')
        {
            m++;
            sum = sum + (ch[i]-'0') * m;
            if (m == 9)
                break;
        }
    }
    int  ret = sum % 11 ;
    if ((ret==10&&ch[12]=='X')||ret == ch[12]-'0')
    printf("Right\n");
    else
     {
        if(ret==10)
        ch[12]='X';
        else
         ch[12]=ret+'0';
         printf("%s",ch);
     }
   
    return 0;
}