void main()
{
struct node* a = buildlistattail(10);
struct node* b = buildlistathead(10);
print(a);
printf("\nlen(a) = %d\n", len(a));
print(b);
printf("\nlen(b) = %d\n", len(b));
printf("\ngetnthfromend = %d\n", getnthfromend(a, 9));
getmiddle(a);
}
void main(){
float x1=1,x2=10,x;
float y1,y2,y,max;
float getmiddle(float,float);//function to get the middle value of x1 and x2.
float getval(float);//function to get the y corresponding to x.
//scanf("%f %f",&x1,&x2);
do{
x = getmiddle(x1,x2);
y = getval(x);
y1 = getval(x1);
y2 = getval(x2);
if((y*y1>0)) x1 = x;
if((y*y2>0)) x2 = x;
}while(fabs(y)>0.0001);
printf("A root of equation is %8.4f",x);
}