#include<stdio.h>

#include<conio.h>

#include<math.h>

#define f(x) x*x*x-5*x+3

#define df(x) 3*x*x-5

//int printline()

//{

//int i;

//for(i=1;i<=60;i++)

//printf("-");

//printf("\n");

//}

int main()

{

float
x0,x1,y0,dy0,e,delta;

int i,n;

printf("enter the
initial guess\n");

scanf("%f%f",&x0,&x1);

printf("enter the
prescribed precision value\n");

scanf("%f",&e);

printf("enter the
maximum number of iteration\n");

scanf("%d",&n);

printf("enter the
minimum allowed value of slope\n");

scanf("%f",&delta);

//printline();

printf("iter\tX0\tF(X0)\tF'(x0)\tX1\n");

//printline();

for(i=1;i<=n;i++)

{

y0 = f(x0);

dy0= df(x0);

if ((fabs(dy0)) < delta)

{

printf("slope is too small\n");

return(0);

}

x1=x0-(y0/dy0);

printf("
%d\t%.2f\t%.2f\t%.2f\t%.2f\n",i,x0,y0,dy0,x1);

if ((fabs(x1-x0)/x1)<=e)

{

//printline();

printf("converges to the
root\n");

printf("number of iteration is
%d\n",i);

printf("root is %.2f\n",x1);

getch();

return(0);

}

x0=x1;

}

//printline();

printf("does not
converges to the root in %d iteration",n);

getch();

}

## No comments:

Write comments