如何在Mac OS X上编译运行C程序

Question

I am learning C and wish to write the program using a text editor on my Mac (running OS X v10.7 (Lion)).

I write the .c file, and compile it using gcc filename.c - which creates executable file called a.out . However, when I type a.out or /a.out , I get the following messages:

-bash: a.out: command not found or -bash: /a.out:
No such file or directory

I have successfully compiled and ran C programs on Linux systems before using this same method. What am I doing wrong on my Mac?

Answer 1

您需要添加一个点来指示可执行文件位于当前目录中，因为当前目录不在路径中：

./a.out

Answer 2

You're just missing one thing! Instead of "/a.out" it should be "./a.out". Another useful thing is changing the output so that you can have multiple compiled programs. Simply, the only thing you need to put in the terminal is the following (fill in the blanks with what you would like)

gcc nameofprogramyouwrote.c -o whatyouwanttheprogramtobenamed

good luck!

Answer 3

You have to add a dot in front of the slash:

./a.out

/a.out would try to execute a program in the root folder ( / ).
a.out will look for your program in all the folders defined in the PATH environment variable.

I have successfully compiled and ran C programs on Linux systems before using this same method. What am I doing wrong on my Mac?

You have to do the same on Linux.

Answer 4

确保使用chmod + x a.out设置可执行文件的权限

Answer 5

To build:

    gcc -Wall -o yourFile yourFile.c

Then to execute:

    ./yourFile

Answer 6

But you forgot the dot,

./a.out

also you can just use cmake to compile your C program into binary if ./a.out doesn't work!

Answer 7

You'll need a compiler. The easiest way however is to install XCode. This way you'll get access to "gcc", Thus,

gcc -o mybinaryfile mysourcefile.c

Then run it like this.

./mybinaryfile

Hope this helps!.