c program of Regular-Falsi Method.

Implementation of Regular-Falsi Method.

#include<stdio.h>

#include<conio.h>

#include<math.h>

#include<string.h>

#include<process.h>

#define EPS 0.00005

#define f(x) 3*x+sin(x)-exp(x)

void FAL_POS();

void main()

{

  clrscr();

printf("\n Solution by FALSE POSITION method\n");

printf("Equation is");

printf("\n\t\t\t 3*x+sin(x)=0\n\n");

FAL_POS();

void FAL_POS()

{

  float f0,f1,f2;

  float x0,x1,x2;

  int i;

printf("Enter the number of iteration:");

scanf("%d",&itr);

for(x1=0.0;;)

{

   f1=f(x1);

if(f1>0)

{

  break;

}

else

{

  x1=x1+0.1;

}

}

x0=x1-0.1;

f0=f(x0);

printf("\n\t\t----------------------------");

printf("\n\t\t     ITERATION\t x2\t\t F(x)\n");

for(i=0;i<itr;i++)

{

  x2=x0-((x1-x0)/(f1-f0))*f0;

  f2=f(x2);

if(f0*f2>0)

{

 x1=x2;

 f1=f2;

}

else

{

x0=x2;

f0=f2;

}

if(fabs(f(2))>EPS)

{

  printf("\n\t\t            %d\t%f\n",i+1,x2,f2);

}

}

printf("\t\t---------------------------");

printf("\n\t\t\tRoot=%f\n",x2);

printf("\t\t---------------------------");

getch();

}