DemoVei-DNA （C代码）

#对于这道题最主要的是观察图形，从图形的规律上找突破口。

#include<stdio.h>
int main()
{
    int N;
    scanf("%d",&N);
    while(N--)
    {
        int a,b;
        scanf("%d%d",&a,&b);
        int i;
        for(i=0;i<b;i++)
        {

            int j;
            int t;
            for(t=0;t<a-1;t++)
            {
                for(j=0;j<a;j++)
                {
                    if(t==j||t+j==(a-1))
                    {
                        printf("X");
                    }
                    else
                    {
                        printf(" ");
                    }
                }
                printf("\n");
            }
        }
        for(i=0;i<a;i++)
        {
            if(i==0||i==a-1)
                printf("X");
            else
                printf(" ");
        }
            printf("\n");
            printf("\n");
    }
    return 0;
}