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SECANT METHOD

Posted By: Abe Fischer     Category: C Programming     Views: 48060

Write a program of SECANT METHOD.

Code for SECANT METHOD in C Programming

#include<stdio.h>
#include<conio.h>
#include<math.h>
#define ESP 0.0001
#define F(x) (x)*(x) - 4*(x) - 10
void main()
{
  float x1,x2,x3,f1,f2,t;
  clrscr();
  printf("\nEnter the value of x1: ");
  scanf("%f",&x1);
  printf("\nEnter the value of x2: ");
  scanf("%f",&x2);
  printf("\n______________________________________________\n");
  printf("\n    x1\t  x2\t  x3\t     f(x1)\t f(x2)");
  printf("\n______________________________________________\n");
  do
  {
  f1=F(x1);
  f2=F(x2);
  x3=x2-((f2*(x2-x1))/(f2-f1));
  printf("\n%f   %f   %f   %f   %f",x1,x2,x3,f1,f2);
  x1=x2;
  x2=x3;
  if(f2<0)
    t=fabs(f2);
  else
    t=f2;
  }while(t>ESP);
printf("\n______________________________________________\n");
printf("\n\nApp.root = %f",x3);
getch();
}

/*
OUT PUT
---------


Enter the value of x1: 4

Enter the value of x2: 2

___________________________________________________________

x1 x2 x3 f(x1) f(x2)
___________________________________________________________

4.000000 2.000000 9.000000 -10.000000 -14.000000
2.000000 9.000000 4.000000 -14.000000 35.000000
9.000000 4.000000 5.111111 35.000000 -10.000000
4.000000 5.111111 5.956522 -10.000000 -4.320987
5.111111 5.956522 5.722488 -4.320987 1.654063
5.956522 5.722488 5.741121 1.654063 -0.143084
5.722488 5.741121 5.741659 -0.143084 -0.004015
5.741121 5.741659 5.741657 -0.004015 0.000010
___________________________________________________________


App.root = 5.741657

*/
  
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Abe Fischer
Abe Fischer author of SECANT METHOD is from Frankfurt, Germany.
 
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