輸入一個數，打印對應的合圍圖像

/*  function:輸入一個整數，打印對應的圖像
 *  author：徐權  date:20150727
 */




#include<stdio.h>
#include<stdlib.h>
#include<string.h>


void paixu(char **,int);
int main(void)
{
int n;
scanf_s("%d", &n, sizeof(n));//VS2013
//scanf("%d", &n);//其他編譯器
char ** a = (char **)malloc(sizeof(char *)*(2*n-1));//因爲部分編譯器是C89標準，所以沒有引用C99的動態分配數組
for (int i = 0; i < (2 * n - 1); i++)
{
a[i] = (char *)malloc(sizeof(char)*(2 * n - 1));
}
memset(a, '0', sizeof(char));
paixu(a, (2*n-1));


system("pause");
return 0;
}
void paixu(char **a,int n)  //打印目標顯示
{
char cha = 'x';
int m = n;
int t = 0;
while (n)
{
for (int i = t; i < n; i++)//循環幅值
{
a[i][t] = cha;
a[t][i] = cha;
a[n - 1][i] = cha;
a[i][n - 1] = cha;
}
t++;
n--;
if (cha == 'z')
{
cha = '0';
}
else if (cha == '9')
{
cha = 'a';
}
else
{
cha++;
}
}
for (int i = 0; i < m; i++)
{
for (int j = 0; j < m; j++)
{
printf(" %c ", a[i][j]);
}
putchar('\n');
}
}