t.c

C语言程 反对萨芬记录卡上的交付离开的撒娇发了啊

#include<stdio.h>
#include<math.h>
int n;
void main()
{ int i;  float s;
  float f(float);
   float AutoTrap(float(*)(float),float,float);
    s=AutoTrap(f,0.0,1.0);
    printf("T(%d)=%f\n",n,s);
    getch();
 }
 float AutoTrap(float(*f)(float),float a,float b)
 {  int i;  float x,s,h=b-a;
     float t1,t2=h/2.0*(f(a)+f(b));  n=1;
       do  {  s=0.0;  t1=t2;
         for(i=0;i<=n;i++)
          {  x=a+i*h+h/2;  s+=f(x);}
         t2=(t1+s*h)/2.0;  n*=2; h/=2.0;}
     while(fabs(t2-t1)>1e-6);
       return t2;  }
    float f(float x)
    {return 1/(1+x*x);}


   /* T(512)=0.785398  */