在屏幕上打印一个菱形

比较挫的代码写法：

#include<stdio.h>

#include<stdlib.h>

#include<Windows.h>

#include<string.h>

int main()

{

    char arr1[] ="                 ";

    char arr2[] ="*****************";

    char arr3[] ="                 ";

    int left =(strlen(arr1)-1)/2;

    int right =(strlen(arr1) - 1) / 2;

    while (right<= strlen(arr2) - 1, left != 0)

    {

        Sleep(1000);

        arr1[left] =arr2[left];

        arr1[right]= arr2[right];

        left--;

        right++;

        printf("%s\n",arr1);

    }

    right =strlen(arr2) - 1;

    left = 0;

    while (left<= right)

    {

 

        Sleep(1000);

        arr2[left] =arr3[left];

        arr2[right]= arr3[right];

        left++;

        right--;

        printf("%s\n",arr2);

    }

 

    system("pause");

    return 0;

}

进阶版：

#include<stdio.h>

#include<stdlib.h>

int main()

{

    intline = 0;

    scanf("%d", &line);

    inti = 0;

    //打印上半部分

    for(i = 0; i < line; i++)

    {

        intj = 0;

        for(j = 0; j < line -i- 1; j++)

        {

            printf(" ");

        }

        for(j = 0; j < 2*i+1; j++)

        {

            printf("*");

        }

        printf("\n");

    }

    //打印下半部分

    for(i = 0; i < line - 1; i++)

    {

        intj = 0;

        for(j = 0; j <= i; j++)

        {

            printf(" ");

        }

        for(j = 0; j < 2 * (line -i-1)-1; j++)

        {

            printf("*");

        }

        printf("\n");

    }

    system("pause");

    return0;

}