编译时找不到头文件，应该如何处理？

zoujinhe

OS：Ubuntu 6.06
编辑器：Eclipse

不论我在Eclipse或是在命令行下编译都不成功。

编译命令：
gcc -o hello ./hello.c

代码是在007xiong 的教程中抄的，如下：

#include <unistd.h>;
#include <pwd.h>;
#include <sys/types.h>;
#include <stdio.h>;
int main(int argc,char **argv)
{
pid_t my_pid,parent_pid;
uid_t my_uid,my_euid;
gid_t my_gid,my_egid;
struct passwd *my_info;
my_pid=getpid();
parent_pid=getppid();
my_uid=getuid();
my_euid=geteuid();
my_gid=getgid();
my_egid=getegid();
my_info=getpwuid(my_uid);
printf("Process ID:%ld\n",my_pid);
printf("Parent ID:%ld\n",parent_pid);
printf("User ID:%ld\n",my_uid);
printf("Effective User ID:%ld\n",my_euid);
printf("Group ID:%ld\n",my_gid);
printf("Effective Group ID:%ld\n",my_egid):
if(my_info)
{
printf("My Login Name:%s\n" ,my_info->;pw_name);
printf("My Password :%s\n" ,my_info->;pw_passwd);
printf("My User ID :%ld\n",my_info->;pw_uid);
printf("My Group ID :%ld\n",my_info->;pw_gid);
printf("My Real Name:%s\n" ,my_info->;pw_gecos);
printf("My Home Dir :%s\n", my_info->;pw_dir);
printf("My Work Shell:%s\n", my_info->;pw_shell);
}
}

Angel lee

这里应该不是头文件的问题吧

1. #include <unistd.h>;
   
2. #include <pwd.h>;
   
3. #include <sys/types.h>;
   
4. #include <stdio.h>;
   

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1. printf("My Login Name:%s\n" ,my_info->;pw_name);
   
2. printf("My Password :%s\n" ,my_info->;pw_passwd);
   
3. printf("My User ID :%ld\n",my_info->;pw_uid);
   
4. printf("My Group ID :%ld\n",my_info->;pw_gid);
   
5. printf("My Real Name:%s\n" ,my_info->;pw_gecos);
   
6. printf("My Home Dir :%s\n", my_info->;pw_dir);
   
7. printf("My Work Shell:%s\n", my_info->;pw_shell);
   

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都多了分号呀

zoujinhe

最简单的：

int main(int argc,char **argv)
{
        printf("Hello linux.\n");
}

也会报错，报错信息如下：
trueman@trueman:~/Desktop$ gcc -o hellow hellow.c
hellow.c: In function ‘main’:
hellow.c:3: warning: incompatible implicit declaration of built-in function ‘printf’
/usr/bin/ld: crt1.o: No such file: No such file or directory
collect2: ld returned 1 exit status

trueman@trueman:~/Desktop$ sudo gcc -o hellow hellow.c
Password:
hellow.c: In function ‘main’:
hellow.c:3: warning: incompatible implicit declaration of built-in function ‘printf’
/usr/bin/ld: crt1.o: No such file: No such file or directory
collect2: ld returned 1 exit status

flw

gcc 有问题了。
重装一个吧！
crt1.o 都找不到，说明 gcc 已经被损坏了。

1. [flw@Sleeper ~]$ whereis crt1.o
   
2. crt1: /usr/lib/crt1.o
   
3. [flw@Sleeper ~]$

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zoujinhe

flw：
    确实whereis crt1.o是什么都没显示，应该文件已经丢掉了。

zoujinhe

trueman@trueman:~/Desktop$ sudo apt-get install gcc
Reading package lists... Done
Building dependency tree... Done
gcc is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 135 not upgraded.
-------------------------------------------------------------------------------------------
我估计我只装了gcc,类库和gdb什么的都没装。但我不清楚要装些什么。

zoujinhe

来位达人指教一下吧。