请教这个题目怎么编代码，

打印的内容自己写

# include <stdio.h>

main()
{
    double len;

    while (1)
        {
            scanf("%lf", &len);
            if (len <= 0)
            {
                printf(".........%lf<=0,quit\n",len);
                printf("bye\n");
                break;
            }
            else
            {
                printf(".........%lf cm = %lf feet, %lf inches \n",len, len / 30.84, len/2.54);
            }
        }   
    return 0;
}

thank you

printf(".........%.2lf cm = %.2lf feet, %.2lf inches \n", len, len / 30.84, len / 2.54);
可以限制显示小数位数为2

这就是个单位换算啊，百度下转换的关系就好了，代码很简单