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fixing issue #198 #249

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fixing issue #198 #249

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5114b01
Merge pull request #1 from pearcej/main
coco3427 May 13, 2025
19f0f98
Merge branch 'pearcej:main' into main
coco3427 May 13, 2025
092c389
fixes issue #198 Needs review because it makes some changes the the c…
coco3427 May 13, 2025
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22 changes: 11 additions & 11 deletions pretext/AtomicData/Pointers.ptx
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Original file line number Diff line number Diff line change
Expand Up @@ -212,7 +212,7 @@ int main( ) {
better error handling with the keyword. The null pointer is often used
in conditions and/or in logical operations.</p>
<p>The following example demonstrates how the null pointer works.
The variable ptrx initially has the address of x when it is declared.
The variable pntrN initially has the address of varN when it is declared.
On the first iteration of the loop, it is assigned the value of
<c>nullptr</c>, which evaluates to a false value; thereby ending the loop:</p>

Expand All @@ -225,15 +225,15 @@ using namespace std;

//Shows the use of a Null pointer to represent "nothing".
int main( ) {
int x = 12345;
int *ptrx = &amp;x;
int varN = 100;
int *pntrN = &amp;varN;

while (ptrx) {
cout &lt;&lt; "Pointer ptrx points to " &lt;&lt; &amp;ptrx &lt;&lt; endl;
ptrx = nullptr;
while (pntrN) {
cout &lt;&lt; "Pointer pntrN points to " &lt;&lt; &amp;pntrN &lt;&lt; endl;
pntrN = nullptr;
}

cout &lt;&lt; "Pointer ptrx points to nothing!\n";
cout &lt;&lt; "Pointer pntrN points to nothing!\n";
}
</input>
</program>
Expand All @@ -249,14 +249,14 @@ int main( ) {
<exercise label="mc_pntrhlp">
<statement>

<p>If the lines (varN = 50;) and (cout &lt;&lt; *ptrN &lt;&lt; endl;) were inserted into line 7-8, what would it cout?</p>
<p>If the lines (varN = 50;) and (cout &lt;&lt; "ptrN: " &lt;&lt; *ptrN &lt;&lt; endl;) were inserted between lines 7 and 8, what would it cout?</p>

</statement>
<choices>

<choice>
<statement>
<p>varPntr: 9</p>
<p>pntrN: 100</p>
</statement>
<feedback>
<p>Not quite, the variable varN no longer equals 100 past line 7!</p>
Expand All @@ -265,7 +265,7 @@ int main( ) {

<choice correct="yes">
<statement>
<p>varPntr: 50</p>
<p>pntrN: 50</p>
</statement>
<feedback>
<p>Right!</p>
Expand All @@ -274,7 +274,7 @@ int main( ) {

<choice>
<statement>
<p>varPntr: 150</p>
<p>pntrN: 150</p>
</statement>
<feedback>
<p>No, the values do not add together!</p>
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