顺序表一元多项式指数相加顺序表程序

以下是顺序表一元多项式指数相加的程序：

#include <stdio.h>
#include <stdlib.h>

#define MAXSIZE 100

typedef struct {
    int coef;  // 系数
    int expn;  // 指数
} ElemType;

typedef struct {
    ElemType data[MAXSIZE];
    int length;
} SqList;

void InitList(SqList *L) {
    L->length = 0;
}

void CreateList(SqList *L) {
    printf("请输入多项式的项数：");
    scanf("%d", &L->length);
    printf("请按照指数递减的顺序输入多项式的系数和指数：\n");
    for (int i = 0; i < L->length; i++) {
        scanf("%d%d", &L->data[i].coef, &L->data[i].expn);
    }
}

void AddList(SqList *La, SqList *Lb, SqList *Lc) {
    int i = 0, j = 0, k = 0;
    while (i < La->length && j < Lb->length) {
        if (La->data[i].expn > Lb->data[j].expn) {
            Lc->data[k++] = La->data[i++];
        } else if (La->data[i].expn < Lb->data[j].expn) {
            Lc->data[k++] = Lb->data[j++];
        } else {
            int sum = La->data[i].coef + Lb->data[j].coef;
            if (sum != 0) {
                Lc->data[k].coef = sum;
                Lc->data[k++].expn = La->data[i].expn;
            }
            i++;
            j++;
        }
    }
    while (i < La->length) {
        Lc->data[k++] = La->data[i++];
    }
    while (j < Lb->length) {
        Lc->data[k++] = Lb->data[j++];
    }
    Lc->length = k;
}

void PrintList(SqList *L) {
    for (int i = 0; i < L->length; i++) {
        printf("%dx^%d", L->data[i].coef, L->data[i].expn);
        if (i != L->length - 1) {
            printf(" + ");
        }
    }
    printf("\n");
}

int main() {
    SqList La, Lb, Lc;
    InitList(&La);
    InitList(&Lb);
    InitList(&Lc);
    CreateList(&La);
    CreateList(&Lb);
    AddList(&La, &Lb, &Lc);
    printf("多项式A：");
    PrintList(&La);
    printf("多项式B：");
    PrintList(&Lb);
    printf("多项式C=A+B：");
    PrintList(&Lc);
    return 0;
}