70分 大犇求助！！！！

#include #include #include<stdio.h> using namespace std; int main() { string ISBN; int a = 0, b; cin >> ISBN; a += (ISBN[0] - '0') * 1; a += (ISBN[2] - '0') * 2; a += (ISBN[3] - '0') * 3; a += (ISBN[4] - '0') * 4; a += (ISBN[6] - '0') * 5; a += (ISBN[7] - '0') * 6; a += (ISBN[8] - '0') * 7; a += (ISBN[9] - '0') * 8; a += (ISBN[10] - '0') * 9; b = a % 11; if (b >= 0 && b <= 9 && ISBN[12] - '0' == b) { cout << "Right"; } else if (b == 10 && ISBN[12] == 'X') { cout << "Right"; } else { if (b >= 0 && b <= 9) { ISBN[12] = b + '0'; cout << ISBN; }

}

return 0;

}