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输出菱形图案优化

输出一个菱形
这个方式是课上老师讲的那个输出进度条的方法,这种方式感觉更快,只需要两次循环。

char str[] = "             ";  //定义为空

int i = 0,j = 0;
for ( i=(strlen(str)/2),j=(strlen(str)/2); i>=0 && j<=strlen(str); i--,j++ )
{
    str[i] = '*';
    str[j] = '*';
    printf("%s\n",str);
}
for ( i=0,j=(strlen(str)-1); i<(strlen(str)/2) && j>=(strlen(str)/2); i++,j-- )
{
    str[i] = ' ';
    str[j] = ' ';
    printf("%s\n",str);
}

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