文件指针的使用与注意事项

Question

1.请改这段代码到能够运行
2.这个代码和链表是混着的
3.二进制文件怎么打开与改写

#include <stdio.h>
typedef struct FamilyMember {
    char name[10]; //name
    short age; //age
    double weight;//weight
    char type[10]; //cat dog human or others
    struct FamilyMember* next;
};

void printFamilyMember(struct FamilyMember* p);
void printFamilyList(struct FamilyMember* head);
void inputFamilyMember(struct FamilyMember* p);
struct FamilyMember* insertListAtTail(struct FamilyMember* head, struct FamilyMember* node);
struct FamilyMember* insertListAtHead(struct FamilyMember* head, struct FamilyMember* node);
struct FamilyMember* deleteNodeFromList(struct FamilyMember* head, int age);

int main(int argc, char* argv[]) {
    struct FamilyMember* head = NULL;
    struct FamilyMember* pMember;
    char* filename;
    FILE* pFILE;
    int i = 0;

    filename = "FamilyList.bi";
    pFile=fopen_(&pFile, filename, "rb");
    if (pFile == NULL) {
        printf("Error happened when open file %s \n", filename);
    }
    // 简单但有bug
    while (!feof(pFile))            //当未读取文件尾标志
    {
        pNode = (struct FamilyMember*)malloc(sizeof(struct FamilyMember));
        fread(pNode, sizeof(*pNode), 1, pFile);
        pNode->next = NULL;
        head = insertListAtTail(head, pNode);
    }
    fclose(pFile);
    printFamilyList(head);
    return 0;
}

for (i = 0; i < 5; i++) {
    pMember = (struct FamilyMember*)malloc(sizeof(struct FamilyMember));
    inputFamilyMember(pMember);
    pMember->next = NULL;
    head = insertListAtTail(head, pMember);
}
printFamilyList(head) {

    head = deleteNodeFromList(head, 5);
    printf("after\n");
    printFamilyList(head);
    return 0;

}
    }

    void printFamilyMember(struct FamilyMember* p) {

        printf("名字：%s\n", (*p).name);
        printf("年龄：%d\n", (*p).age);
        printf("体重：%.2lf\n", (*p).weight);
        printf("种类：%s\n\n", (*p).type);
        //please finish 
        return;
    }

    void inputFamilyMember(struct FamilyMember* p) {
        printf("pelase input name age weight type in order\n ");
        scanf_s("%s", p->name, sizeof(p->name));
        scanf_s("%d", &(p->age));
        scanf_s("%lf", &(p->weight));
        scanf_s("%s", p->type, sizeof(p->type));
        return;
    }

Answer 1

基于Monster 组和AIGC的调写：若有帮助，还望采纳~~：

• 源代码问题：
  文件指针命名不一致：pFile 和 pFILE 应保持一致。
  pNode 未定义：在读取文件时，应定义 struct FamilyMember* pNode;。
  fopen_ 应更正为 fopen。
  对 feof 的使用有误：在读取文件时，应检查 fread 的返回值。
  printFamilyList 和 main 函数的布局有误：for 循环和 printFamilyList 应在 main 函数内部。
  scanf_s 在标准 C 中不可用，应使用 scanf 或者 fgets 和 sscanf 组合。

修改后的代码；

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

typedef struct FamilyMember {
    char name[10];
    short age;
    double weight;
    char type[10];
    struct FamilyMember* next;
} FamilyMember;

void printFamilyMember(FamilyMember* p);
void printFamilyList(FamilyMember* head);
void inputFamilyMember(FamilyMember* p);
FamilyMember* insertListAtTail(FamilyMember* head, FamilyMember* node);

int main(int argc, char* argv[]) {
    FamilyMember* head = NULL;
    FamilyMember* pMember;
    FamilyMember* pNode;
    char* filename = "FamilyList.bi";
    FILE* pFile = fopen(filename, "rb");
    if (pFile == NULL) {
        printf("Error happened when open file %s\n", filename);
        return 1;
    }

    while (1) {
        pNode = (FamilyMember*)malloc(sizeof(FamilyMember));
        if (fread(pNode, sizeof(FamilyMember), 1, pFile) != 1) {
            free(pNode);
            break;
        }
        pNode->next = NULL;
        head = insertListAtTail(head, pNode);
    }
    fclose(pFile);
    printFamilyList(head);

    for (int i = 0; i < 5; i++) {
        pMember = (FamilyMember*)malloc(sizeof(FamilyMember));
        inputFamilyMember(pMember);
        pMember->next = NULL;
        head = insertListAtTail(head, pMember);
    }

    printFamilyList(head);
    return 0;
}

void printFamilyMember(FamilyMember* p) {
    printf("名字：%s\n", p->name);
    printf("年龄：%d\n", p->age);
    printf("体重：%.2lf\n", p->weight);
    printf("种类：%s\n\n", p->type);
}

void inputFamilyMember(FamilyMember* p) {
    printf("请输入名字、年龄、体重、种类：\n");
    scanf("%9s", p->name);
    scanf("%hd", &p->age);
    scanf("%lf", &p->weight);
    scanf("%9s", p->type);
}

void printFamilyList(FamilyMember* head) {
    FamilyMember* current = head;
    while (current != NULL) {
        printFamilyMember(current);
        current = current->next;
    }
}

FamilyMember* insertListAtTail(FamilyMember* head, FamilyMember* node) {
    if (head == NULL) {
        return node;
    }

    FamilyMember* current = head;
    while (current->next != NULL) {
        current = current->next;
    }

    current->next = node;
    return head;
}