C语言实现用 * 打印X形图案

	int a = 0;
	while (scanf("%d", &a) != EOF)
	{
		int i = 0;
		for (i = 0; i < a; i++)            //i为x轴
		{
			int j = 0;
            //每次循环输出一个*或者输出一个空格
			for (j = 0; j < a; j++)        //j为y轴
			{
				if (i == j)
					printf("*");
				else if (i + j == a - 1)
					printf("*");
				else
					printf(" ");
			}
			printf("\n");
		}
	}

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>

int main()
{
	int n = 0, i = 0, j = 0;
	char arr[51][51] = { 0 };
	scanf("%d", &n);

	for (i = 0; i < n; i++)
	{
		for (j = 0; j < n; j++)
		{
			arr[i][j] = ' ';
		}
	}

	for (i = 0; i < n; i++)
	{
		arr[i][i] = '*';
		arr[i][n - i - 1] = '*';
	}

	for (i = 0; i < n; i++)
	{
		for (j = 0; j < n; j++)
		{
			printf("%c", arr[i][j]);
		}
		printf("\n");
	}
}