Question

1.编写程序实现以下分段函数的功能.

|x| (x<0)

y= sin(x+1) (x=0)

lg(2x)+x2 (x>0)
C语言

Answer 1

#include<math.h>
double fun(double x)
{if(x<0)return -x;
else if(x==0)return sin(1.0);
else return log10(2*x)+x*x;
}