c项目编译错误[关闭]

Question

好的，我所有的文件都是这样的

sendmail.h 在这个文件中声明了一些函数和一些常量

#define STMP_SERVER "smtp.exmail.qq.com"
#define LOGIN_NAME "secbot@test.com"
#define LOGIN_PASSOWRD "123456"
#define MAIL_TO "root@test.com"


char* get_local_addr(char* buf, size_t len);

int base64_encode(unsigned char *buf, int nLen, char *pOutBuf, int nBufSize);

void sendemail(char *smtpServer, char *serveruser, char *serverpassword, char *serverip);

int open_socket(struct sockaddr *addr);

sendmail.c 有一些类似于 sendmail.h 的功能

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <unistd.h>
#include <sys/time.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <stddef.h>

..............

test.c 是主函数

#include "sendmail.h"


#define SERVERNAME "root"
#define SERVERPASSWORD "123456"


int main()
{   
    sendemail(STMP_SERVER, SERVERNAME, SERVERPASSWORD,NULL);
    return 0;
}

但是编译错误然后说这个

[root@ops test]# gcc -o test test.c 
In file included from test.c:1:
sendmail.h:10: error: expected declaration specifiers or ‘...’ before ‘size_t’
sendmail.h:16: warning: ‘struct sockaddr’ declared inside parameter list
sendmail.h:16: warning: its scope is only this definition or declaration, which is probably not what you want
test.c: In function ‘main’:
test.c:10: error: ‘NULL’ undeclared (first use in this function)
test.c:10: error: (Each undeclared identifier is reported only once
test.c:10: error: for each function it appears in.)

Answer 1

1. 停止在a.c 中使用#include "sendmail.c" 之类的东西
2. 创建一个头文件，其中包含sendmail.c 中函数的声明
3. #include 来自a.c 的头文件