#include iostream"

using namespace std;

#define MAX 50

int main()//十六轉二

{

int elem2[MAX];

char elem16[MAX];

cout << "請輸入十六進位制數，並以‘$’結束：";

int flag = 1;

char ch;

int i = 0;

while (flag)

{

cin >> ch;

if (ch != "$")

{

elem16[i] = ch;

i++;

}

else

{

flag = 0;

}

}

int length1 = i;

int length2 = 0;

int n = 0;

int sum = 0;

for (n = 0; n < length1; n++)//判斷是否是十六進位制數

{

int x = (int)elem16[n];

if ((x >= 48 && x <= 57) || (x >= 65 && x <= 70))

sum++;

}

if (sum == length1)

{

int j = 0;

int number = 0;

int k = 0;

int p = 0;

int m = 0;

int cout = 3;

for (j = 0; j < length1; j++)

{

m = cout;

int x = (int)elem16[j];

if (x >= 48 && x <= 57)

{

number = elem16[j] - 48;

}

else if (x >= 65 && x <= 70)

{

number = elem16[j] - 55;

}

if (number != 1)

{

do

{

elem2[m] = number % 2;

number = number / 2;

length2++;

k++;

m--;

} while (number>1);

if (k == 3)

{

elem2[m] = 1;

length2++;

m--;

}

else

{

elem2[m] = 1;

m--;

length2++;

for (p = 0; p < 3-k; p++)

{

elem2[m] = 0;

length2++;

m--;

}

}

k = 0;

}

else

{

elem2[m] = 1;

m--;

length2++;

for (p = 0; p < 3; p++)

{

elem2[m] = 0;

length2++;

m--;

}

}

cout = cout + 4;

}

}

else

{

cout << "輸入的不是十六進位制數！";

}

cout << "正序輸出：";

for (i = 0; i < length2; i++)

cout << elem2[i] << " ";

cout << endl;

return 0;