求大神,在线等.编程计算分段函数,根据键盘输入的x值,在屏幕输出y值.

#include<stdio.h>#include<math.h>void main(){float x,y;scanf("%f",&x);if(x>0)y=sin(x);else if(x==0)y=99;elsey=cos(x);print("%f",y);}