REGULAR FALSI METHOD IN C

Regular Falsi method using c program

#include<stdio.h>

#include<math.h>

#include<conio.h>

float root(float x)

{

float f;

f=x*x*x-x-1;

return(f);

}

void main()

{

int i,n;

float a,b,x,e,t,p;

clrscr();

printf("Type a and b\n");

scanf("%f %f",&a,&b);

printf("Type maximum number of interval n\n");

scanf("%d",&n);

printf("Type the value of e\n");

scanf("%f",&e);

p=root(a)*root(b);

if(p>0)

printf("Root does not lies between a and b");

else

{

i=1;

t=1;

while(t>e && i<=n)

{

x=(a*root(b)-b*root(a))/(root(b)-root(a));

if(root(x)*root(a)>0)

a=x;

else

b=x;

t=fabs(a-b);

if(t>fabs(root(x)))

t=fabs(root(x));

i++;

}

if(i>n)

printf("Iteration does not converge");

else

{

 printf("Approximate root=%8.4f\n",x);

 printf("Number of Iteration=%d\n",i);

}

}

getch();

}

OUTPUT: