Question

Parse string java code

Write a recursive program that can calculate the value of a given polynomial in a string, which is not more than the tenth order, for the given x. The polynomial will be given in the following format and should display the value of the polynomial for spaced-out x

Using index of for -/+

Answer 1

#include <stdio.h>
#include <stdlib.h>
#define MAXSIZE 10
 
void main()
{
    int array[MAXSIZE];
    int i, num, power;
    float x, polySum;
 
    printf("Enter the order of the polynomial \n");
    scanf("%d", &num);
    printf("Enter the value of x \n");
    scanf("%f", &x);
    /*  Read the coefficients into an array */
    printf("Enter %d coefficients \n", num + 1);
    for (i = 0; i <= num; i++)
    {
        scanf("%d", &array[i]);
    }
    polySum = array[0];
    for (i = 1; i <= num; i++)
    {
        polySum = polySum * x + array[i];
    }
    power = num;
 
    printf("Given polynomial is: \n");
    for (i = 0; i <= num; i++)
    {
        if (power < 0)
        {
            break;
        }
        /*  printing proper polynomial function */
        if (array[i] > 0)
            printf(" + ");
        else if (array[i] < 0)
            printf(" - ");
        else
            printf(" ");
        printf("%dx^%d  ", abs(array[i]), power--);
    }
    printf("\n Sum of the polynomial = %6.2f \n", polySum);
}

Runtime Test Cases

$ cc pgm.c

$ a.out
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
 
$ a.out
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