高手帮我看看这个指向函数的指针的程序错误。。。。。。。谢谢

#include<stdio.h>
#include<math.h>
#define PI 3.1415926
double y(double);
double cos(double);
double table(double(*f)(),double,double,double);
void main()
{
      printf("Table of y(x)=2*x*x-x+1/n/n");
      table(y,0.0,2.0,0.5);
      printf("/nTable of cos(x)/n/n");
      table(cos,0.0,PI,0.5);
}
double table(double(*f)(),double min,double max,double step)
{
      double a,value;
      for(a=min;a<=max;a+=step)
      {
             value=(*f)(a);
             printf("%5.2f %10.4f/n",a,value);
       }
}
double y(double x)
{
         return (2*x*x-x+1);
}

这个在调用的函数中定义了指向函数的指针，我觉得不对，但有调不出来。。。崩溃了快！！！

麻烦帮帮忙看看！！！！