怎么改成      *
           *  *  *
        *  *  *  *  *
     *  *  *  *  *  *  *
        *  *  *  *  *
           *  *  *
              *
#include<stdio.h>
#include<stdlib.h>
int main(void)
{
    int i,j;
    for (i = 1; i <= 14; i += 1)
    {
        if (i % 2 != 0)
        {
            if (i <= 7)
            {
                for (j = 1; j <= i; j += 1)
                {
                    printf("*");
                }
            }
            else if (i > 7 && i <= 14)
            {
                for (j = 14; j>i; j--)
                    printf("*");
            }
            printf("\n");
        }
    }
    system("pause");                                                                                                                                                                                                                                                                  
    return 0;
}

前面打印几个空格。空格数量你自己算算，我不知道，我小学没毕业。

#include<stdio.h>
#include<stdlib.h>
int main(void)
{
    int i,j,k;
    for (i = 1; i <= 3; i ++)
    {
        for (j = 4; j > i; j--)
        {
            printf(" ");
        }
        for (k = 1; k <= i * 2 - 1; k ++)
        {
            printf("*");
        }
        printf("\n");
    }
    for (i = 1; i <=4; i++)
    {
        for (j = 1; j < i; j++)
        {
            printf(" ");
        }
        for (k = 1; k <= 9 - 2 * i; k++)
        {
            printf("*");
        }
        printf("\n");
    }
    system("pause");                                                                                                                                                                                                                                                                  
    return 0;
}
改对齐了，每个星号之间的空格不会

早先在手机看的，效果不一样。
星号之间也可以加空格呀，把星星排稀点就行了
比如：printf("*  ");

星号后加空格，然后空格加空格就行了