//輸入兩個浮點數，然后打印出用二者的差除以二者的乘積所得的結果。輸入非數字則循環處理輸入。#include <stdio.h>int main (void){?? ?double i, j, h;?? ?do?? ?{?? ?printf ("請輸入第一個浮點數:");?? ?scanf ("%lf",&i);?? ?}while (scanf("%lf",&i) != 1);?? ?do?? ?{?? ?printf ("請輸入第二個浮點數:");?? ?scanf ("%lf",&j);?? ?}while (scanf("%lf",&j) != 1);?? ?h = (i - j)/(i * j);?? ?printf("%lf",h);?? ?system ("pause");?? ?return 0;}