Compiling assignments

Gcc 4.4.4 -> objective-C

1.Fc13 2.6.34 + gcc4.4.4
2.yum install gnustep* (or maybe adding "yum install gcc-objc")

For C codes:
3.gcc -x objective-c -o

For objective -c codes:
3.gcc -o -L /GNUstep/System/Library/Libraries/ -lobjc -lgnustep-base

FC13 2.6.34 -> Erlang
Before installing, ensure uv install apps. below:
GNU make/GNU C compiler/Perl /OpenSSL / X Windows

1.yum install erlang
2.Shell: enter "erl" into Erlang Shell.
3.Quit: Ctrl+G -> q

4.Put the following into a text file:

-module(test).     %%1
-export([fac/1]).  %%2

fac(0) -> 1;
fac(N) -> N * fac(N-1).

Explaination:

%%1:Erlang程序文件称为module(模块)。第一行就是告诉我们这个模块的名字。

当我们在使用另一个模块中的函数时，我们使用下面的语法 module_name:function_name(arguments).所以：test:fac(10).
意味着我们从test模块中调用一个叫做fac的函数，并且带有参数“10”.

%%2:-export([fac/1]):导出一个带有一个参数的函数fac

2nd Example:

-module(tut1).
-export([fac/1, mult/2]).

fac(1) ->
1;

fac(N) ->
N * fac(N - 1).

mult(X, Y) ->
X * Y.

save it as test.erl in a directory that’s easy to get to with the Terminal. Then, from the Terminal, cd into that directory and type erl (which, if everything worked right, should start the Erlang command-line interpreter). From the interpreter, run the following commands:

1> c(test).
{ok,test}

2> test:fac(20).
2432902008176640000

3> test:fac(40).
815915283247897734345611269596115894272000000000