使用C语言输出一个边长为7的菱形！

[align=left]学识尚浅，有待提高。后续会改进。[/align]#include<stdio.h>
#include <windows.h>
int main()
{
 char arr1[] = "*************";
 char arr2[] = "             ";
 char arr3[] = "             ";
 int left = 0;
 int right = 0;
 for (left = 6, right = 6;
  left <= right;
  left--, right++)
 {
  arr2[left] = arr1[left];
  arr2[right] = arr1[right];
  printf("%s\n", arr2);
  if (left == 0)
  {
   break;
  }
 }
 for (left = 0, right = 12;
  left <= right;
  left++, right--)
 {
  arr1[left] = arr3[left];
  arr1[right] = arr3[right];
  printf("%s\n", arr1);
 }
 system("pause");
 return 0;
}