A
                        BBB
                     CCCCC
                   DDDDDDD
                     CCCCC
                        BBB
                           A
请问这个用C语言怎么表示
#include<stdio.h>
#define N 7            
#define L (80-N)/2   
int main()
{
    char c = 'A';
    int i, j, p;
    for (i = 1; i <= N; i++, p____)
    {
        if (i <= (N + 1) / 2)
            p = ____;
        else
            p = ____;
        for (j = 1; j <= L+____; j++)
            printf(" ");
        for (j = 1; j <= 2 * p - 1; j++)
            printf("%c", c);
        printf("\n");
    }
    return 0;

}
我想请问四根横线处应该填什么才能答出，谢谢