C程序未执行：权限被拒绝

Question

I have installed C/C++ compiler using

sudo apt-get install build-essential

created file named "first.c" and write an initial code of C language in it.

cc -c first.c

cc -o first first.c

./first

-bash: ./first: Permission denied

chmod +x first

ls -al


sana@ubuntu:/media/E68828DA8828AACF/Documents/cWork$ ls -al
total 25
drwx------ 1 sana sana 4096 Dec 16 08:47 .
drwx------ 1 sana sana 4096 Dec 16 08:17 ..
-rw------- 1 sana sana 8379 Dec 16 08:47 first
-rw------- 1 sana sana   82 Dec 16 08:23 first.c
-rw------- 1 sana sana   82 Dec 16 08:22 first.c~
-rw------- 1 sana sana 1504 Dec 16 08:23 first.o

Solved : using changing my current working directory to sana@ubuntu:~/Documents$ instead sana@ubuntu:/media/E68828DA8828AACF/Documents/cWork$

why ?? i dont understand

sana@ubuntu:~/Documents$ touch first.c
     sana@ubuntu:~/Documents$ gedit first.c
     sana@ubuntu:~/Documents$ cc -c first.c
     sana@ubuntu:~/Documents$ cc -o first first.c
     sana@ubuntu:~/Documents$ ./first
     i am sana 
     sana@ubuntu:~/Documents$

yes exacty the device is mounted with noexec option that do not execute any script from drive to run scripts you need to change noexec option. The method of which is given here .

Answer 1

Did you give execute permission to first ; done by chmod +x first ?