#include <stdio.h>int main (void){?? ?double num1, num2, hv;?? ?printf ("請(qǐng)輸入兩個(gè)浮點(diǎn)數(shù)：");?? ?while (2 != scanf("%lf %lf",&num1,&num2))?? ?{?? ??? ?printf ("請(qǐng)輸入兩個(gè)浮點(diǎn)數(shù)：");?? ?}?? ?hv = (num1 > num2)?(num1 - num2):(num2 - num1)/(num1 * num2);?? ?printf ("%lf",hv);?? ?system ("pause");?? ?return 0;}