怎么用循环结构输出图案

Question

Answer 1

供参考：

#include <stdio.h>
#include <stdlib.h>
int  main()
{
    int i, j, k, n=4;
    //printf("输入n:");
    //scanf("%d", &n);
    for (k = 1 - n; k <= n - 1; k++)
    {
        i = n - abs(k);
        for (j = 1; j <= n - i; j++)
            printf(" ");
        for (j = 1; j <= 2 * i - 1; j++)
            printf("%d", j);
        printf("\n");
    }
    return 0;
}