C语言内存分配：堆与栈，习题报错

问题遇到的现象和发生背景

在《笨办法学C语言》中，习题17-内存分配：堆和栈
代码报错

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#include 
#include 
#include 
#include 
#include 

#define MAX_DATA 512
#define MAX_ROWS 100

struct Address{
    int id;
    int set;
    char name[MAX_DATA];
    char email[MAX_ROWS];
};

struct Database{
    struct Address rows[MAX_ROWS];
};

struct Connection{
    FILE *file;
    struct Database *db;
};

void die(const char *message)
{
    if(errno){
        perror(message);
    }else{
        printf("ERROR: %s\n",message);
    }
    
    exit(1);
}

void Address_print(struct Address *addr)
{
    printf("%d %s %s\n",addr->id, addr->name, addr->email);
}

void Database_load(struct Connection *conn)
{
    int rc = fread(conn->db,sizeof(struct Database),1,conn->file);
    if(rc != 1)
        die ("Failed to load database.");
}

struct Connection *Database_open(const char *filename,char mode)
{
    struct Connection *conn = malloc(sizeof(struct Connection));
    if(!conn)
        die("Memory error");
    
    conn->db = malloc(sizeof(struct Database));
    if(!conn->db)
        die("Memory error");
    
    if(mode == 'c'){
        conn->file = fopen(filename,"w");
    }else{
        conn->file = fopen(filename,"r+");
        
        if(conn->file){
            Database_load(conn);
        }
    }
    
    if(!conn->file)
        die("Failed to open the file");
    
    return conn;
};

void Database_close(struct Connection *conn)
{
    if(conn){
        if(conn->file)
            fclose(conn->file);
        if(conn->db)
            free(conn->db);
        free(conn);
    }
}

void Database_write(struct Connection *conn)
{
    rewind(conn->file);
    
    int rc = fwrite(conn->db,sizeof(struct Database),1,conn->file);
    if(rc == 1)
        die("Failed to write database.");
    
    rc = fflush(conn->file);
    if(rc == -1)
        die("Cannot flush database.");
}

void Database_create(struct Connection *conn)
{
    int i = 0;
    
    for(i = 0;i < MAX_ROWS;i++){
        //make a prototype to initialize it
        struct Address addr = {.id = i,.set = 0};
        //then just assign it
        conn->db->rows[i] = addr;
    }
}

void Database_set(struct Connection *conn,int id,const char *name,const char *email)
{
    struct Address *addr = &conn->db->rows[id];
    if (addr->set)
        die ("Already set,delete it frist");
    
    addr->set = 1;
    //WARNING: bug ,read the "How To Break It" and fix this
    char *res = strncpy(addr->name,name,MAX_DATA);
    //demostrate the strncpy bug
    if(!res)
        die("Name copy failed");
    
    res = strncpy(addr->email,email,MAX_DATA);
    if(!res)
        die("Email copy failed");
}

void Database_get(struct Connection *conn,int id)
{
    struct Adress *addr = &conn->db->rows[id];
    
    if(addr->set){
        Address_print(addr);
    }else{
        die("ID is not set");
    }
}

void Database_delete(struct Connection *conn,int id)
{
    struct Address addr = {.id = id,.set = 0};
    conn->db->rows[id] = addr;
}

void Database_list(struct Connection*conn)
{
    int i = 0;
    struct Database *db = conn->db;
    
    for(i = 0;i < MAX_ROWS; i++){
        struct Address *cur = &db->rows{i};
        
        if(cur->set){
            Address_print(cur);
        }
    }
    
}

int main(int argc,char argv[])
{
    if(argc < 3)
        die("USAGE:ex17  [action params]");
    char *filename = argv[1];
    char action = argv[2][0];
    struct Connection *conn = Database_open(filename,action);
    int id = 0;
    
    if (argc > 3)id = atoi(argv[3]);
    if (id >= MAX_ROWS) die("There's not that many records.");
    
    switch(action){
    case 'c':
        Database_create(conn);
        Database_write(conn);
        break;
        
    case 'g':
        if(argc != 4)
            die("Need an id to get");
        
        Database_get(conn,id);
        break;
        
    case 's':
        if(argc != 6)
            die("Need id,name,email to set");
        
        Database_set(conn,id,argv[4],argv[5]);
        Database_write(conn);
        break;
        
    case 'd':
        if(argc != 4)
            die("Need id to delete");
        
        Database_delete(conn,id);
        Database_write(conn);
        break;
        
    case '1':
        Database_list(conn);
        break;
        
    default:
        die("Invalid action: c=create, g=get, s=set, d=del,l=list");
    }
    
    Database_close(conn);
    return 0;
}

运行结果及报错内容

E:/学习/C语言/笨办法学C/ex17.c 0 -1 In function 'Database_get':
E:/学习/C语言/笨办法学C/ex17.c 131 24 [警告] initialization of 'struct Adress *' from incompatible pointer type 'struct Address *' [-Wincompatible-pointer-types]
E:/学习/C语言/笨办法学C/ex17.c 133 9 [错误] invalid use of undefined type 'struct Adress'
E:/学习/C语言/笨办法学C/ex17.c 134 17 [警告] passing argument 1 of 'Address_print' from incompatible pointer type [-Wincompatible-pointer-types]
E:/学习/C语言/笨办法学C/ex17.c 37 36 [说明] expected 'struct Address *' but argument is of type 'struct Adress *'
E:/学习/C语言/笨办法学C/ex17.c 0 -1 In function 'Database_list':
E:/学习/C语言/笨办法学C/ex17.c 152 25 [警告] initialization of 'struct Address ' from incompatible pointer type 'struct Address ()[100]' [-Wincompatible-pointer-types]
E:/学习/C语言/笨办法学C/ex17.c 152 34 [错误] expected ',' or ';' before '{' token
E:/学习/C语言/笨办法学C/ex17.c 0 -1 At top level:
E:/学习/C语言/笨办法学C/ex17.c 161 5 [警告] second argument of 'main' should be 'char **' [-Wmain]
E:/学习/C语言/笨办法学C/ex17.c 0 -1 In function 'main':
E:/学习/C语言/笨办法学C/ex17.c 165 19 [警告] initialization of 'char *' from 'char' makes pointer from integer without a cast [-Wint-conversion]
E:/学习/C语言/笨办法学C/ex17.c 166 23 [错误] subscripted value is neither array nor pointer nor vector
E:/学习/C语言/笨办法学C/ex17.c 3 0 In file included from E:/学习/C语言/笨办法学C/ex17.c
E:/学习/C语言/笨办法学C/ex17.c 170 29 [警告] passing argument 1 of 'atoi' makes pointer from integer without a cast [-Wint-conversion]
C:/Program Files/RedPanda-Cpp/MinGW64/x86_64-w64-mingw32/include/stdlib.h 434 32 [说明] expected 'const char *' but argument is of type 'char'
E:/学习/C语言/笨办法学C/ex17.c 190 28 [警告] passing argument 3 of 'Database_set' makes pointer from integer without a cast [-Wint-conversion]
E:/学习/C语言/笨办法学C/ex17.c 111 62 [说明] expected 'const char *' but argument is of type 'char'
E:/学习/C语言/笨办法学C/ex17.c 190 36 [警告] passing argument 4 of 'Database_set' makes pointer from integer without a cast [-Wint-conversion]
E:/学习/C语言/笨办法学C/ex17.c 111 79 [说明] expected 'const char *' but argument is of type 'char'

我想要达到的结果

让程序正确的运行

• 你可以参考下这个问题的回答, 看看是否对你有帮助, 链接: https://ask.csdn.net/questions/7733757
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