为什么,只有50分,求助

P1055 [NOIP2008 普及组] ISBN 号码

AC Code ```c #include <bits/stdc++.h> using namespace std; int main() { char a[100]; scanf("%c-%c%c%c-%c%c%c%c%c-%c", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6], &a[7], &a[8], &a[9]); int sum = 0,remainder; char ch; for (int i = 0; i < 9; i++) { sum += (a[i] - '0') * (i + 1); } remainder = sum % 11; if (remainder == 10) ch = 'X'; else ch = remainder + '0'; if (ch == a[9]) printf("Right\n"); else printf("%c-%c%c%c-%c%c%c%c%c-%c\n", a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], ch); return 0; } ```
by wzj0829 @ 2023-08-21 10:14:14


@[wzj0829](/user/1028403) 谢谢,AC了
by DKsniper @ 2023-08-21 11:47:24


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