Question

在打印多项式时，第一个系数和指数被重复打印n次（无条件）次。

Input:
     No of terms: 3
     Enter coefficient and exponent: 3 3
     Enter coefficient and exponent: 2 2
     Enter coefficient and exponent: 1 1

Output:
3x^(3) + 3x^(3) + 3x^(3)

这是代码：

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

struct Node{
    int coef , exp;
    struct Node* next;
};

struct Node* create( struct Node* );

int main(){

    int val , choice , loc;
    struct Node* A = NULL;
    struct Node* B = NULL;

    A = create( A );
    B = create( B );
    display( A );
    display( B );

    do{
        printf("\n\n-----POLYNOMIAL OPERATIONS-----\n1.Addition\n2.Multiply\n3.Evaluate\n4.Exit\n--->");
        scanf("%d",&choice);

        switch( choice ){
            case 1://Adding
                    break;
            case 2://Multiplying
                    break;
            case 3://Evaluating
                    break;
        }

    }while( choice != 4 );


    return 0;
}

struct Node* create( struct Node* p ){

    int i , c , x , t;
    printf("\nNumber of terms: ");
    scanf("%d",&t);
    for( i = 0 ; i < t ; i++ ){
        struct Node* temp = (struct Node*)malloc(sizeof(struct Node));
        printf("Enter Coefficient & Exponent: ");
        scanf("%d%d",&c,&x);
        temp->coef = c;
        temp->exp = x;
        if( p == NULL ){
            p = temp;
            temp->next = p;
        }else{
            struct Node* temp1 = p;
            while( temp1->next != p ) temp1 = temp1->next;
            temp1->next = temp;
            temp->next = p;
        }
    }
    return p;
}

void display( struct Node* p ){

    struct Node* temp = p;
    printf("\nPOLYNOMIAL: ");

    do{
        printf("%dx^(%d)",p->coef,p->exp);
        temp = temp->next;
        if( temp != p ){
            printf(" + ");
        }
    }while( temp != p );
}

Answer 1

你只需要改变：

 do{
        printf("%dx^(%d)",temp->coef,temp->exp);
        temp = temp->next;
        ...

现在，每次进行显示循环时，您都会取消引用初始节点！

我想指出的是，由于现在正在编写display()函数，如果传递NULL指针，则会出现段错误。如果您在0的任一提示中输入Number of terms:，就会发生这种情况。

循环链表中的多项式

1 个答案: