Sep 30, 2011

C Program to evaluate the given polynomial P(x)=AnXn + An-1Xn-1 + An-2Xn-2+... +A1X + A0, by reading its coefficents into an array.

Write a C program to evaluate the given polynomial P(x)=AnXn + An-1Xn-1 + An-2Xn-2+... +A1X + A0, by reading its coefficents into an array.A Polynomial is a mathematical expression involving a sum of powers in one or more variables multiplied by coefficients. Read more about C Programming Language .

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#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#define MAXSIZE 10

voidmain()
{
 int a[MAXSIZE];
 int i, N,power;
 float x, polySum;

 clrscr();

 printf("Enter the order of the polynomial\n");
 scanf("%d", &N);

 printf("Enter the value of x\n");
 scanf("%f", &x);

 /*Read the coefficients into an array*/

 printf("Enter %d coefficients\n",N+1);
 for (i=0;i <= N;i++)
 {
  scanf("%d",&a[i]);
 }

 polySum = a[0];

 for (i=1;i<= N;i++)
 {
  polySum = polySum * x + a[i];
 }

 power = N;

 /*power--;*/

 printf("Given polynomial is:\n");
 for (i=0;i<= N;i++)
 {
  if (power < 0)
  {
   break;
  }

  /* printing proper polynomial function*/
  if (a[i] > 0)
   printf(" + ");
  else if (a[i] < 0)
   printf(" - ");
  else
   printf (" ");
  printf("%dx^%d  ",abs(a[i]),power--);

 }

 printf("\nSum of the polynomial = %6.2f\n",polySum);
}
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