【图】C 创建链表并将信息存储在二进制文件中读取的实例代码

代码如下：

#include stdio.h
#include stdlib.h

typedef struct Node {
int data;
struct Node *next;
} Node;

void getInfo(Node * node);
int printNodes(Node *node);
void saveToFile(Node * node, char * filename);
void readFromFile(char * filename, int n);

Node nodes[20];
int main() {
    Node *first = (Node *) malloc(sizeof(Node));
    first-data = 1;
    first-next = NULL;
    getInfo(first);
    int numbers = printNodes(first);
    saveToFile(first, "D:/123123");
    readFromFile("D:/123123", numbers);
    return 1;
}

void getInfo(Node * node) {
    Node *last = node;
    char ch = 0;
    while ((ch = getchar()) != 'x') {
        Node *newNode = (Node *) malloc(sizeof(Node));
        newNode-data = ch - 'a';
        newNode-next = NULL;
        last-next = newNode;
        last = newNode;
    }
}

int printNodes(Node * node) {
    int i = 1;
    Node *p = node;
    while (p != NULL ) {
        printf("%d,", p-data);
        p = p-next;
        i++;
    }
    return i;
}

void saveToFile(Node * node, char * filename) {
    Node *p = node;
    FILE *fp;
    if ((fp = fopen(filename, "wb")) == NULL ) {
        return;
    } else {
        while (p != NULL ) {
            fwrite(p, sizeof(Node), 1, fp);
            p = p-next;

        }
    }
    fclose(fp);
}

void readFromFile(char * filename, int n) {
    int i = 1;
    FILE *fp;
    if ((fp = fopen(filename, "rb")) == NULL ) {
        return;
    } else {
        while (i n) {
            Node *newNode = (Node *) malloc(sizeof(Node));
            fread(newNode, sizeof(Node), 1, fp);
            printf("--%d,",newNode-data);
            i++;
        }
    }
}