Subversion Repositories wimsdev

Hier staan enkele voorbeelden van interactieve oefeningen gemaakt met Createxo

Hier staan enkele voorbeelden van interactieve oefeningen gemaakt met Createxo

<ol>

<ol>

<li> <hr style="width:50%"/>

<li> <hr style="width:50%"/>

een simpele berekening van de lengte van een vector in het platte vlak.

een simpele berekening van de lengte van een vector in het platte vlak.

Hier is de broncode van deze oefening/opgave:

Hier is de broncode van deze oefening/opgave:

<p><pre>

<p><pre>

\title{Norm of vector 2D}

\title{Norm of vector 2D}

\integer{x=random(-10..10)}

\integer{x=random(-10..10)}

\integer{y=random(-10..10)}

\integer{y=random(-10..10)}

\real{norm=sqrt((\x)^2+(\y)^2)}

\real{norm=sqrt((\x)^2+(\y)^2)}

\statement{Wat is de lengte van de vector (\x,\y) in R<sup>2</sup>?}

\statement{Wat is de lengte van de vector (\x,\y) in R<sup>2</sup>?}

sqrt(x^2+y^2).}

sqrt(x^2+y^2).}

\answer{De lengte}{\norm}

\answer{De lengte}{\norm}

</pre> <p>

</pre> <p>

In this exercise, one has defined 2 random integers, x and y, who are the

In this exercise, one has defined 2 random integers, x and y, who are the

coordinates of the vector. Then a third parameter, this time real, is defined

coordinates of the vector. Then a third parameter, this time real, is defined

by the formula of the length. The exercise takes a freestyle reply under the

by the formula of the length. The exercise takes a freestyle reply under the

name of ``the length'', and the good reply should be the value of the third

name of ``the length'', and the good reply should be the value of the third

parameter``norm''. A hint is prepared in the exercise, which recalls the

parameter``norm''. A hint is prepared in the exercise, which recalls the

You can

You can

!set parm=oef_answercnt=1&oef_choicecnt=0&oef_title=Norm of vector 2D&oef_format=html&oef_computeanswer=no&level=2&oef_parms=%5Cinteger%7Bx%3Drandom%28-10..10%29%7D%0D%0A%5Cinteger%7By%3Drandom%28-10..10%29%7D%0D%0A%5Creal%7Bnorm%3Dsqrt%28%28%5Cx%29%5E2%2B%28%5Cy%29%5E2%29%7D&oef_statement=What is the length of the vector %28%5Cx%2C%5Cy%29 in R%3Csup%3E2%3C%2Fsup%3E%3F&ansprompt1=The length&ansgood1=%5Cnorm&oef_hint=The length f a vector %28x%2Cy%29 is equal to %0D%0Asqrt%28x%5E2%2By%5E2%29.&oef_solution= $

!set parm=oef_answercnt=1&oef_choicecnt=0&oef_title=Norm of vector 2D&oef_format=html&oef_computeanswer=no&level=2&oef_parms=%5Cinteger%7Bx%3Drandom%28-10..10%29%7D%0D%0A%5Cinteger%7By%3Drandom%28-10..10%29%7D%0D%0A%5Creal%7Bnorm%3Dsqrt%28%28%5Cx%29%5E2%2B%28%5Cy%29%5E2%29%7D&oef_statement=What is the length of the vector %28%5Cx%2C%5Cy%29 in R%3Csup%3E2%3C%2Fsup%3E%3F&ansprompt1=The length&ansgood1=%5Cnorm&oef_hint=The length f a vector %28x%2Cy%29 is equal to %0D%0Asqrt%28x%5E2%2By%5E2%29.&oef_solution= $

!href cmd=reply&mode=guided&$parm load this example into the menu

!href cmd=reply&mode=guided&$parm load this example into the menu

 to test it. (You can also copy the source into the menu under raw mode.)

 to test it. (You can also copy the source into the menu under raw mode.)

<li><hr style="width:50%"/> <b>Trace of matrix 2x2</b>, computes the trace of a matrix. The question

<li><hr style="width:50%"/> <b>Trace of matrix 2x2</b>, computes the trace of a matrix. The question

 the complete source of the exercise.

 the complete source of the exercise.

<p><pre>

<p><pre>

\title{Trace of matrix 2x2}

\title{Trace of matrix 2x2}

\language{en}

\language{en}

\computeanswer{yes}

\computeanswer{yes}

We have first defined an integer ``range'', to be used to bound the

We have first defined an integer ``range'', to be used to bound the

random values a,b,c,d which are the elements of the matrix. And the trace is

random values a,b,c,d which are the elements of the matrix. And the trace is

of course defined by the sum of the elements on the diagonal. Please take

of course defined by the sum of the elements on the diagonal. Please take

care to the definition <span class="tt">trace=(\a)+(\d)</span>: the pairs of parentheses

care to the definition <span class="tt">trace=(\a)+(\d)</span>: the pairs of parentheses

are necessary, for the substitution is literary. If you define

are necessary, for the substitution is literary. If you define

Remark that in this exercise, the non-computed replies are admitted

Remark that in this exercise, the non-computed replies are admitted

You can

You can

!href cmd=reply&mode=guided&$parm load this example into the menu

!href cmd=reply&mode=guided&$parm load this example into the menu

 to test it. (You can also copy the source into the menu under raw mode.)

 to test it. (You can also copy the source into the menu under raw mode.)

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