下列程序是分别判断输入的 N 个数是否可能是二进制、八进制、十进制、十六进制，横线处应该填入的是（ ）
#include <iostream>
using namespace std;
int main() {
int n = 0;
cin >> n;
for (int i = 0; i < n; i++) {
char str[11];
cin >> str;
char max = '0';
for (int i = 0; str[i] != '\0'; i++)
if (str[i] > max)
max = str[i];
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}
return 0;
}
- A.
cout << (max <= '1') << " " << (max <= '7') << " " << (max <= '9') << " " << (max <= 'F') << endl; - B.
cout << (max <= 1) << " " << (max <= 7) << " " << (max <= 9) << " " << (max <= 'F') << endl; - C.
cout << (max <= 1) << " " << (max <= 7) << " " << (max <= 9) << " " << (max <= F) << endl; - D.
cout << (max >= 1) << " " << (max >= 7) << " " << (max >= 9) << " " << (max >= F) << endl;