Question

c语言程序的问题？

第一题的C语言程序

Answer 1

#include<stdio.h>
int main()
{ double x,y;
scanf("%lf",&x);
if(x<0)y=0;
else if(x<=15)y=4*x/3;
else y=2.5*x-10.5;
printf("%f\n",y);
return 0;
}