C program to find value using secant method | C programming

#include<stdio.h>
#include <math.h>
#include<conio.h>
#define EST 0.05
#define F(x) x-exp(x)+2
int main()
{
int i = 1;
float x0,x1,a,b,c,d,f1,x2,f0,error;
printf("\nEnter the value of x0: ");
scanf("%f",&x0);
printf("\nEnter the value of x1: ");
scanf("%f",&x1);
printf("\n__________________________________________________________________\n");
printf("\niteration\tx0\t x1\t f0\t f1\t x2\t\terror");
printf("\n___________________________________________________________________\n");
f0=F(x0);
f1=F(x1);
x2=x1-((f1*(x1-x0))/(f1-f0));
printf("%f",x2);
error=fabs((x2-x1)/x2);
printf("\n %d \t %.2f\t %.2f\t %.2f \t %.3f \t %.3f \t %.3f", i, x0,x1,f0,f1,x2,error);
do{
i++;
x0=x1;
f0= f1;
x1=x2;

f0=F(x0);
f1=F(x1);
x2=x1-((f1*(x1-x0))/(f1-f0));
error=fabs((x2-x1)/x2);
printf("\n %d \t %.2f\t %.2f\t %.2f \t %.4f \t %.4f \t %.4f", i, x0,x1,f0,f1,x2,error);
}while(error>EST);
printf("\n__________________________________________________________\n");
printf("\n\nApp.root = %f",x2);
return 0;
}