Secant Method (Numerical Method)

#include <stdio.h>
#include <conio.h>
#include <math.h>
#define e 0.00001
float func(float x){
 return (x*x*x-2*x-5);
}
int main(){
int i =0;
float x1,x2,x3,fx1,fx2,fx3;
printf("Enter You Guess for x1 and x2 \n");
scanf("%f%f",&x1,&x2);
do{
fx1 = func(x1);
fx2 = func(x2);
x3 = ((x1*fx2)-(x2*fx1))/(fx2-fx1);
fx3 = func(x3);
if (i==0){
 printf("x1 x2  x3  f(x1)     f(x2)     f(x3) \n ");
}
printf("%f  %f  %f  %f    %f        %f \n",x1,x2,x3,fx1,fx2,fx3);
x1=x2;
x2=x3;
++i;
}while ((fabs(fx3))>e);
printf("The Root Using Second Method %f \n",x3);
return 0;
}