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# Copyright (C) YEAR Free Software Foundation, Inc.
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#. type: One-char language identifier
#: train601.languagecode:1
#, no-wrap
msgid "E"
msgstr ""

#. type: Title-text
#: train601/scene.txt:1
#, no-wrap
msgid "train601:A function"
msgstr ""

#. type: Resume-text
#: train601/scene.txt:2
#, no-wrap
msgid "train601:Create a function in order to make your program shorter."
msgstr ""

#. type: ScriptName-text
#: train601/scene.txt:3
#, no-wrap
msgid "train601:Move"
msgstr ""

#. type: \b; header
#: train601-help/tproc1.txt:1
#, no-wrap
msgid "Exercise"
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:3
#, no-wrap
msgid ""
"The <a object|bottr>bot</a> must pass over all the <a object|waypoint>blue "
"crosses</a> on the ground. The way that must be covered is made of two "
"squares. The first one measures 15 meters, the second 25 meters."
msgstr ""

#. type: Image filename
#: train601-help/tproc1.txt:4
#, no-wrap
msgid "tproc1a"
msgstr ""

#. type: \b; header
#: train601-help/tproc1.txt:5
#, no-wrap
msgid "General principle"
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:7
#, no-wrap
msgid ""
"In order to solve this problem, the most efficient solution consists in "
"creating a <a cbot|function>function</a> that instructs the bot to move on a "
"square shape of a certain size. The main program becomes then very "
"simple:<c/>"
msgstr ""

#. type: \s; block (usually verbatim code)
#: train601-help/tproc1.txt:12
#, no-wrap
msgid ""
"extern void object::Function1( )\n"
"{\n"
"\tSquare(15);\n"
"\tSquare(25);\n"
"}"
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:14
#, no-wrap
msgid ""
"You still have to define the function called <code>Square</code>. In order "
"to do this, you will have to write some instructions outside the <a "
"cbot|bloc>block</a> that until now was the frame of each one of your "
"programs. At the very end of the program, after the last closing brace, we "
"will define the function <code>Square</code>. The program will take the "
"following shape:"
msgstr ""

#. type: \s; block (usually verbatim code)
#: train601-help/tproc1.txt:24
#, no-wrap
msgid ""
"extern void object::Function1( )\n"
"{\n"
"\t<n/>main function ...<code>\n"
"}\n"
"\n"
"void object::Square(float length)\n"
"{\n"
"\t</code>new function ...<c/>\n"
"}"
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:26
#, no-wrap
msgid ""
"Let us look in detail at the different elements of the declaration of the "
"function <code>Square</code>:"
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:29
#, no-wrap
msgid ""
"<code><a cbot|void>void</a></code>\n"
"This means that this function will return no value."
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:32
#, no-wrap
msgid ""
"<code><a cbot|object>object</a>::</code>\n"
"When you write this in front of the function name, you can have access in "
"the function to all the characteristics of the bot, such as "
"<code>position</code>, <code>orientation</code>, etc. In this exercise, this "
"element is not compulsory, as we will not need the characteristics of the "
"bot in the function."
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:35
#, no-wrap
msgid ""
"<code>Square (  )</code>\n"
"This is the name of the function. You can call it Square, or any other name."
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:38
#, no-wrap
msgid ""
"<code><a cbot|float>float</a> length</code>\n"
"Here you define the parameters that the function will get when it is "
"called. The first time the function is actually called with "
"<code>Square(15)</code>, the variable <code>length</code> will contain the "
"value <code>15</code>. The second time, <code>length</code> will contain "
"<code>25</code>."
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:40
#, no-wrap
msgid "Here is in detail what will happen when the program is executed:\n"
msgstr ""

#. type: Bullet: '-'
#: train601-help/tproc1.txt:40
#, no-wrap
msgid "First the main function <code>Function</code> will be executed."
msgstr ""

#. type: Bullet: '-'
#: train601-help/tproc1.txt:41
#, no-wrap
msgid ""
"At the line <code>Square(15)</code>, the program will follow the red arrow "
"and enter the function <code>Square</code> a first time, <code>length</code> "
"containing <code>15</code>."
msgstr ""

#. type: Bullet: '-'
#: train601-help/tproc1.txt:42
#, no-wrap
msgid ""
"At the end of the function <code>Square</code>, the program follows the "
"orange arrow and comes back to the main function."
msgstr ""

#. type: Bullet: '-'
#: train601-help/tproc1.txt:43
#, no-wrap
msgid ""
"At the line <code>Square(25)</code>, the program will follow the blue arrow "
"and enter the function <code>Square</code> a second time."
msgstr ""

#. type: Bullet: '-'
#: train601-help/tproc1.txt:44
#, no-wrap
msgid ""
"At the end of the function <code>Square</code>, the program follows the "
"light blue arrow and comes back to the main function."
msgstr ""

#. type: Image filename
#: train601-help/tproc1.txt:46
#, no-wrap
msgid "tproc1b"
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:48
#, no-wrap
msgid ""
"In the function <code>Square</code>, use the instructions <code><a "
"cbot|move>move</a></code> and <code><a cbot|turn>turn</a></code>. In order "
"to make it shorter, you can use a <code><a cbot|for>for</a></code> loop, "
"that will repeat the instructions <code><a cbot|move>move</a></code> and "
"<code><a cbot|turn>turn</a></code> 4 times; however, this is not compulsory."
msgstr ""

#. type: \s; block (usually verbatim code)
#: train601-help/tproc1.txt:57
#, no-wrap
msgid ""
"void object::Square(float length)\n"
"{\n"
"\tfor ( int i=0 ; i<4 ; i=i+1 )\n"
"\t{\n"
"\t\tmove(length);\n"
"\t\tturn(90);\n"
"\t}\n"
"}"
msgstr ""

#. type: \t; header
#: train601-help/tproc1.txt:58
#, no-wrap
msgid "See also"
msgstr ""

#. type: Plain text
#: train601-help/tproc1.txt:59
#, no-wrap
msgid ""
"<a cbot>Programming</a>, <a cbot|type>types</a> and <a "
"cbot|category>categories</a>."
msgstr ""