#include

using namespace std;

int main()

{

char letter, b[11];

int x, S=0, i;

cin >> letter;

for (i=2; i<=10; i++)

cin >> b[i];

if (letter >= 'A' && letter <= 'H')

x = (int)letter - 55;

if (letter >= 'J' && letter <= 'N')

x = (int)letter - 56;

if (letter >= 'P' && letter <= 'Z')

x = (int)letter - 57;

if (letter == 'I')

x = (int)letter - 39;

if (letter == 'O')

x = (int)letter - 44;

b[0] = x/10;

b[1] = x%10;

for (i=2; i<=10; i++)

{S += b[i]*(11-i);

S = S + b[0] + b[1]*9 + b[10];

}

if (S%10 == 0)

cout << "real" << endl;

else

cout << "fake" << endl;

return 0;

}

 

output都是fake😵‍💫

這......錯的地方有點多啊

1. if (letter >= 'P' && letter <= 'Z')

WXY錯了

2. 你的b是字元陣列，但是你把它當數字了，要先減48才行

3.for (i=2; i<=10; i++)

i<=9

4. S += b[i]*(11-i)

是10-i

5. S = S + b[0] + b[1]*9 + b[10]

只要執行一次就好了，所以移到for迴圈外