單項選擇題以下程序功能是計算函數(shù)f(x,y,z)=(x+y)/(x-y)+(z+y)/(z-y)的值，請選擇填空。注意，第【2】空的備選答案在下一題。 #include <stdio.h> #include <math.h> float f (float m, float n); int main(void) { flaot x, y, z, sum; scanf("%f%f%f", &x, &y, &z); sum=f(【1】)+f(【2】); printf("sum=%f/n", sum); return 0; } float f (float m, float n) { float value; value=m/n; return value; }
A、x-y , x+y
B、x+y , x-y
C、z+y , z-y
D、z-y , z+y