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++;
}
}
}
