Method of Regula-Falsi using C 








Sumit Kar, Numerical Methods, C, Timus Rak


/*

 Method of Regula-Falsi


 Equation: x^3-4x-9=0

*/
#include<conio.h>
#include<stdio.h>

void main()
{
 float a,b,k,c;
 int i;
 float f(float);
 clrscr();
 printf("\nEnter first initial value:: ");
 scanf("%f",&a);
 printf("\nEnter second initial value:: ");
 scanf("%f",&b);
 for(i=1;i<=5;i++)
 {
  c=b-((b-a)*(f(b)/(f(b)-f(a))));
  k=f(c);
  if(k>0)
 b=c;
  if(k<=0)
 a=c;
 }
 printf("\nRoot is:: %f",c);
 getch();
}
float f(float x)
{
 return (x*x*x)-(4*x)-9;
}








































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