/*
 * ass16.c polynomial operations
 */
#include <stdio.h>
#include <stdlib.h>
typedef struct term {
        float coeff ;
        int exp;
        struct term *next;
} term, *poly;

poly initPoly();
int isZero(poly);
term *makeMono(float, int);
void insertTerm(poly, term *);
void readPoly(poly);
void printPoly(poly);
poly addPoly(poly, poly);
poly multPoly(poly, poly);


int main()
{
    poly p, q, r;

    p = initPoly();
    q = initPoly();
    printf("Enter exponent of x and the coefficient ");
    printf("Terminate with -ve exp:\n");
    readPoly(p);
    printf("Polynomial p: ");
    printPoly(p);
    printf("Enter exponent of x and the coefficient ");
    printf("Terminate with -ve exp:\n");
    readPoly(q);
    printf("Polynomial q: ");
    printPoly(q);
    r = addPoly(p,q);
    printf("Polynomial p + q: ");
    printPoly(r);
    r = multPoly(p,q);
    printf("Polynomial p X q: ");
    printPoly(r);

    return 0;
}

poly initPoly(){
     poly p;
     p = (poly)malloc(sizeof(term));
     p->next = (poly)malloc(sizeof(term));
     p->next->exp = 0;
     p->next->coeff = 0.0;
     p->next->next = NULL;
     return p;
}

int isZero(poly p){
    return (p->next->exp == 0) && (p->next->coeff == 0.0);
}