C语言 编程 求下列分段函数的值

#include"stdio。h"
double Y(double x){
return x-1?1。0/(1+x):0;
}
int main()
{
\x05double x;
\x05scanf("%lf",&x);
printf("y=%。2lf\n",Y(x));
\x05return 0;
}