Hi all,

I have written a program to find the reciprocal of an input number by using newton rhapson iterative method. Below is the algorithm implementation in C:

When I enter 3 as my input number, i get an absurd answer. On using hand-calculations on paper, I am converging to the right value of the reciprocal which is .33. Kindly point out the errors. Thank you.Code:#include<stdio.h> #include<stdlib.h> #include<math.h> int main() { double guess,newguess,input,error=1.0; printf("Enter the input number"); scanf("%f",&input); printf("Enter the guess for the reciprocal of the input number between -1.0 and 1.0"); scanf("%f",&guess); while(error>0.0001) { newguess=guess*(2-(input*guess)); error=newguess-guess; guess=newguess; } printf("The reciprocal of the input number is %f",newguess); system("pause"); return 0; }