数据结构中线性表在不知道长度的时候怎么输入数据(语言-c语言)

Question

我用循环输入没有输出，刚刚开始学，希望可以解答一下，求指教😊😊非常感谢

Answer 1

#include <string.h>
#include <stdio.h>

typedef struct _node
{
    char *data;
    int length;
} Node;

int main()
{
    Node head = {0};
    head.data = (char *)malloc(100 * sizeof(char));
    int i = 0;
    char ch;
    while (i < 100 && (ch = getchar()) != '\n')
    {
        if (ch == ' ')
            continue;
        head.data[i++] = ch;
    }
    head.length = i;

    for (i = 0; i < head.length - 1; i++)
    {
        for (int j = i + 1; j < head.length; j++)
        {
            if (head.data[i] == head.data[j])
            {
                memcpy(&head.data[j], &head.data[j + 1], head.length - j);
                head.length--;
                i--;
            }
        }
    }
    char *p = (char *)malloc(head.length * sizeof(char));
    memcpy(p, head.data, head.length);
    free(head.data);
    head.data = p;

    for (i = 0; i < head.length; i++)
    {
        printf("%c ", head.data[i]);
    }

    return 0;
}