下列程序的输出结果是
#include
using namespace std;
int main()
{
     char a[] = "Hello, World";
     char *ptr = a;
     while (*ptr)
     {
           if (*ptr >= 'a' && *ptr <= 'z')
                 cout << char(*ptr + 'A' -'a');
           else cout << *ptr;
           ptr++;
     }
     return 0;
}
A、 HELLO, WORLD      
B、Hello, World
C、hELLO, wORLD   
D、hello, world