/* C program to evaluate the given polynomial *
* P(x)=AnXn + An-1Xn-1 + An-2Xn-2+… +A1X + A0, by *
* reading its coefficients into an array. [Hint:Rewrite *
* the polynomial as *
* P(x) = a0 + x(a1+x(a2+x(a3+x(a4+x(...x(an-1+xan)))) *
* and evaluate the function starting from the inner loop]*/

#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);
}

/*—————————————————–
Output
RUN 1
Enter the order of the polynomial
2
Enter the value of x
2
Enter 3 coefficients
3
2
6
Given polynomial is:
+ 3x^2   + 2x^1   + 6x^0
Sum of the polynomial =  22.00

RUN 2
Enter the order of the polynomial
4
Enter the value of x
1
Enter 5 coefficients
3
-5
6
8
-9
Given polynomial is:
+ 3x^4   – 5x^3   + 6x^2   + 8x^1   – 9x^0
Sum of the polynomial =   3.00

—————————————————–*/

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Tagged as: by reading its coefficents into an array. [Hint:Rewrite the polynomial as P(x) = a0 + x(a1+x(a2+x(a3+x(a4+x(...x(an-1+xan)))) and evalate the function starting from the inner loop, C program to evaluate the given polynomial P(x)=AnXn + An-1Xn-1 + An-2Xn-2+... +A1X + A0