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8 | between -10 and 10 (inclusive): |
8 | between -10 and 10 (inclusive): |
9 | <pre> |
9 | <pre> |
10 | \integer{x1=random(-10..10)} |
10 | \integer{x1=random(-10..10)} |
11 | </pre> |
11 | </pre> |
12 | This random parameter may then be called by the word |
12 | This random parameter may then be called by the word |
13 | <b>< |
13 | <b><span class="tt wims_code_variable">x1</span></b>, in the statement, the replis, the hint and the solution. |
14 | That is, each word < |
14 | That is, each word <span class="tt wims_code_variable">x1</span> in these texts will be replaced |
15 | by the random value of the parameter. This substitution will also take |
15 | by the random value of the parameter. This substitution will also take |
16 | place in the definitions of other parameters which follow that of x1. |
16 | place in the definitions of other parameters which follow that of x1. |
17 | <p> |
17 | <p> |
18 | Suppose now that you have entered |
18 | Suppose now that you have entered |
19 | <pre> |
19 | <pre> |
Line 27... | Line 27... | ||
27 | in the statement of the exercise. Suppose that for a certain request of |
27 | in the statement of the exercise. Suppose that for a certain request of |
28 | the exercise, a random value <font color="red">-7</font> |
28 | the exercise, a random value <font color="red">-7</font> |
29 | is attributed to \x1. Then the following parameter \y1 will take the value |
29 | is attributed to \x1. Then the following parameter \y1 will take the value |
30 | -4, and the statement of the exercise will be presented under the form <div class="wimscenter">Compute the multiplication of -7 by -4. |
30 | -4, and the statement of the exercise will be presented under the form <div class="wimscenter">Compute the multiplication of -7 by -4. |
31 | </div> |
31 | </div> |
32 | You may then define a numerical reply in the name of < |
32 | You may then define a numerical reply in the name of <span class="tt">The product</span>, |
33 | having for the good solution < |
33 | having for the good solution <span class="tt wims_code_words">(\x1)*(\y1)</span>. (Remark that here |
34 | the parentheses are necessary, because the substitution is done literarily.) |
34 | the parentheses are necessary, because the substitution is done literarily.) |
35 | <a name="list"></a> |
35 | <a name="list"></a> |
36 | !if oefparm isitemof $special_parm |
36 | !if oefparm isitemof $special_parm |
37 | !changeto help/oefparm.phtml |
37 | !changeto help/oefparm.phtml |
38 | !endif |
38 | !endif |
39 | <p>$table_header |
39 | <p>$table_header |
40 | <caption>Some other examples of parameters |
40 | <caption>Some other examples of parameters |
41 | !href cmd=help&special_parm=$special_parm,oefparm#list [complete list] |
41 | !href cmd=help&special_parm=$special_parm,oefparm#list [complete list] |
42 | </caption> |
42 | </caption> |
43 | $table_hdtr<th>Definition<th>Effect |
43 | $table_hdtr<th>Definition<th>Effect |
44 | $table_tr<td>< |
44 | $table_tr<td><span class="tt wims_code_words">\real{x=random(-5..5)}</span> |
45 | <td>\x will be a random real number<br/>between -5 and 5 |
45 | <td>\x will be a random real number<br/>between -5 and 5 |
46 | $table_tr<td>< |
46 | $table_tr<td><span class="tt wims_code_words">\real{a=random(-5,-3,0.3,4)}</span> |
47 | <td>\a will be a real number taken randomly<br/>among -5,-3,0.3 and 4 |
47 | <td>\a will be a real number taken randomly<br/>among -5,-3,0.3 and 4 |
48 | $table_tr<td>< |
48 | $table_tr<td><span class="tt wims_code_words">\complex{z=(1+2*i)^3}</span> |
49 | <td>\z will be the complex number (1+2*i)^3 |
49 | <td>\z will be the complex number (1+2*i)^3 |
50 | $table_tr<td>< |
50 | $table_tr<td><span class="tt wims_code_words">\text{sign=random(+,-)}</span> |
51 | <td>\sign will be a random sign: + ou - |
51 | <td>\sign will be a random sign: + ou - |
52 | $table_tr<td>< |
52 | $table_tr<td><span class="tt wims_code_words">\integer{n=3*exp(\a)}</span> |
53 | <td>\n will be the closest integer to 3*e<sup>\a</sup> <br/>(it depends on |
53 | <td>\n will be the closest integer to 3*e<sup>\a</sup> <br/>(it depends on |
54 | the value of \a) |
54 | the value of \a) |
55 | $table_tr<td><tt class="wims_code_words">\function{f=random<br/> (x^2+1,sin(x),log(x))}</tt> |
55 | $table_tr<td><tt class="wims_code_words">\function{f=random<br/> (x^2+1,sin(x),log(x))}</tt> |
56 | <td>\f will be a random function: either x^2+1,<br/>or sin(x), or |
56 | <td>\f will be a random function: either x^2+1,<br/>or sin(x), or |
57 | log(x) |
57 | log(x) |
58 | $table_tr<td>< |
58 | $table_tr<td><span class="tt wims_code_words">\real{a=evalue(x^2+sin(y),x=3,y=4)}</span> |
59 | <td>Evaluation of the function x^2+sin(y),<br/> |
59 | <td>Evaluation of the function x^2+sin(y),<br/> |
60 | for x=3, y=4 |
60 | for x=3, y=4 |
61 | $table_tr<td>< |
61 | $table_tr<td><span class="tt wims_code_words">\real{r=solve(x^3-3*x+1,x=0..1)}</span> |
62 | <td>\r will the the simple root of x^3-3x+1 between 0 and 1 |
62 | <td>\r will the the simple root of x^3-3x+1 between 0 and 1 |
63 | $table_tr<td>< |
63 | $table_tr<td><span class="tt wims_code_words">\function{h=simplify(x^5*y^3*x^2/y)}</span> |
64 | <td>Simplified expression: x<sup>7</sup>y<sup>2</sup> |
64 | <td>Simplified expression: x<sup>7</sup>y<sup>2</sup> |
65 | $table_tr<td>< |
65 | $table_tr<td><span class="tt wims_code_words">\function{g=diff(sin(x)+cos(y),x)}</span> |
66 | <td>\g will the the derivative of sin(x)+cos(y) with respect to x |
66 | <td>\g will the the derivative of sin(x)+cos(y) with respect to x |
67 | $table_tr<td>< |
67 | $table_tr<td><span class="tt wims_code_words">\function{F=int(x^2+3*x+1,x)}</span> |
68 | <td>\F will an antiderivative of x^2+3*x+1,<br/> |
68 | <td>\F will an antiderivative of x^2+3*x+1,<br/> |
69 | the constant term being not garanteed to be always the same |
69 | the constant term being not garanteed to be always the same |
70 | !!$table_tr<td><tt class="wims_code_words">\function{F=int(t^2+3*t+1,t=1..x)} |
70 | !!$table_tr<td><tt class="wims_code_words">\function{F=int(t^2+3*t+1,t=1..x)} |
71 | !! <td>\F will the antiderivative of x^2+3*x+1 with g(1)=0 |
71 | !! <td>\F will the antiderivative of x^2+3*x+1 with g(1)=0 |
72 | $table_tr<td>< |
72 | $table_tr<td><span class="tt wims_code_words">\real{a=int(t^2+3*t+1,t=0..1)}</span> |
73 | <td>\a will the numerical integral of x^2+3*x+1 from 0 to 1 |
73 | <td>\a will the numerical integral of x^2+3*x+1 from 0 to 1 |
74 | $table_tr<td>< |
74 | $table_tr<td><span class="tt wims_code_words">\text{f=htmlmath(2*x^2+3*x)}</span> |
75 | <td>\f will be rendered in html as: 2x<sup>2</sup>+3x |
75 | <td>\f will be rendered in html as: 2x<sup>2</sup>+3x |
76 | $table_tr<td>< |
76 | $table_tr<td><span class="tt wims_code_words">\text{f=texmath(2*x^2+3*x)}</span> |
77 | <td>\f will be the TeX source for the expression. |
77 | <td>\f will be the TeX source for the expression. |
78 | $table_tr<td>< |
78 | $table_tr<td><span class="tt wims_code_words">\integer{n=items(a,b,c,d,e,f)}</span> |
79 | <td>\n will be the number of items (here it is 6) in the list |
79 | <td>\n will be the number of items (here it is 6) in the list |
80 | {a,b,c,d,e,f} |
80 | {a,b,c,d,e,f} |
81 | $table_tr<td>< |
81 | $table_tr<td><span class="tt wims_code_words">\text{i=item(3,a,b,c,d,e,f)}</span> |
82 | <td>\i will be the item number 3 of the list |
82 | <td>\i will be the item number 3 of the list |
83 | {a,b,c,d,e,f} (hence c). |
83 | {a,b,c,d,e,f} (hence c). |
84 | $table_tr<td>< |
84 | $table_tr<td><span class="tt wims_code_words">\text{s=shuffle(6)}</span> |
85 | <td>\s will be the list of 6 integers 1,2,...,6, in random order. |
85 | <td>\s will be the list of 6 integers 1,2,...,6, in random order. |
86 | $table_tr<td>< |
86 | $table_tr<td><span class="tt wims_code_words">\text{s=shuffle(a,b,c,d,e)}</span> |
87 | <td>\s will be the letters {a,b,c,d,e} in random order. |
87 | <td>\s will be the letters {a,b,c,d,e} in random order. |
88 | $table_tr<td><tt class="wims_code_words">\matrix{m=1,2,3<br/>4,5,6<br/>7,8,9}</tt> |
88 | $table_tr<td><tt class="wims_code_words">\matrix{m=1,2,3<br/>4,5,6<br/>7,8,9}</tt> |
89 | <td>\m will be the matrix of 3 rows and 3 columns. |
89 | <td>\m will be the matrix of 3 rows and 3 columns. |
90 | $table_tr<td>< |
90 | $table_tr<td><span class="tt wims_code_words">\text{t=asis(How do you do? item(1,2,3))}</span> |
91 | <td>The string as it is, with no transformation nor conditionality. |
91 | <td>The string as it is, with no transformation nor conditionality. |
92 | 92 | ||
93 | $table_end <p> |
93 | $table_end <p> |
94 | 94 | ||
95 | Conditional parameters: You may write |
95 | Conditional parameters: You may write |
96 | <pre> |
96 | <pre> |
97 | \text{ttt=_condition?_def1} |
97 | \text{ttt=_condition?_def1} |
98 | \text{ttt=_condition?_def1:_def2} |
98 | \text{ttt=_condition?_def1:_def2} |
99 | </pre> |
99 | </pre> |
100 | <p> |
100 | <p> |
101 | In this case, <tt>ttt |
101 | In this case, <span class="tt">ttt</span> will be set to <span class="tt">_def1</span> if |
102 | <tt>_condition |
102 | <span class="tt">_condition</span> is true, or to <span class="tt">_def2</span> otherwise (in the second |
103 | syntax). |
103 | syntax). |
104 | !href target=wims_mhelp cmd=help&special_parm=if List of conditions |
104 | !href target=wims_mhelp cmd=help&special_parm=if List of conditions |
105 | <p> |
105 | <p> |
106 | The relative positionning of the definition and the statement is important: |
106 | The relative positionning of the definition and the statement is important: |
107 | if a variable is defined AFTER the statement, the evaluation of the variable |
107 | if a variable is defined AFTER the statement, the evaluation of the variable |
108 | will take place only AFTER the user has replied to the question. In this |
108 | will take place only AFTER the user has replied to the question. In this |
109 | case, the definition may involve user replies, via < |
109 | case, the definition may involve user replies, via <span class="tt wims_code_variable">\reply1</span>, |
110 | < |
110 | <span class="tt wims_code_variable">\reply2</span>, etc. And the variable can be used in testing |
111 | conditions or feedbacks. |
111 | conditions or feedbacks. |
112 | 112 | ||
113 | 113 |