#include<stdio.h>
#include<conio.h>
#include<math.h>
#define E 0.001

float f (float x)
{
    return (x-exp(x*-1));
}
void main()
{
    int ctr,temp,ctr1;
    float res,res1;
    int p,NO;
    float X1=0.00,X2=0.00,prevX3;
    float X3,FX1,FX2,FX3;
    int co[10];
    clrscr();

//For Scanning X1 and X2

    printf("\nEnter the Roots:1::");
    flushall();
    scanf("%f",&X1);

    printf("\nEnter the Roots:2::");
    flushall();
    scanf("%f",&X2);

//Greater than Zero roots

     FX1=f(X1);
     FX2=f(X2);


    if((FX1 * FX2)>0)
    {
        printf("\nThis is not Proper Approximation");

    }

    ctr1=0;
    clrscr();

    printf("\n==========================================================");
    printf("\nNO\tX1\tFX1\tX2\tFX2\tX3\tFX3");
    printf("\n==========================================================");

    do
    {

        prevX3=X3;

        X3 = ((X1*FX2) - (X2*FX1)) / (FX2 - FX1);

        FX1=FX2=FX3=0.0;

            FX3  = f(X3);
            FX1  = f(X1);
            FX2  = f(X2);

        printf("\n%d\t%.4f\t%.4f\t%.4f\t%.4f\t%.4f\t%.4f",ctr1+1,X1,FX1,X2,FX2,X3,FX3);

        if((FX1 * FX3)>0)
        {
            X1=X3;

        }
        elseif(FX3 == 0)
        {
            printf("%.4f",X3);
            break;
        }
        else
        {
            X2=X3;

        }

        ctr1++;
    }
    while(fabs(prevX3-X3)>E);

    printf("\n\n\tThe Root:: %.4f",X3);

    getch();
}