题解 | ISBN号码

#include <stdio.h>

int main() {
    int a,b,c;
    char d;
    scanf("%d-%d-%d-%c",&a,&b,&c,&d);
    int judge =(int) (a + (b/100)*2 +((b/10)%10)*3+(b%10)*4+(c/10000)*5+((c/1000)%10)*6+((c/100) %10)*7+((c%100)/10)*8+(c%10)*9)%11;
    if(judge==10)
    {
      if(d == 'X') printf("Right");
      else printf("%d-%d-%d-X",a,b,c);  
    }
    else
    {
        if(d == 'X')
        {
            printf("%d-%d-%d-%d",a,b,c,judge);
        }
        else 
        {
            if(judge ==d-'0') printf("Right");
            else  printf("%d-%d-%d-%d",a,b,c,judge);        
        }
    }
    /*if(judge % 11 ==d)
    {
        printf("Right");
    } 
    else 
    {
        d=judge % 11;
        printf("%d-%d-%d-%d",a,b,c,d);    
    }*/
    return 0;
}