Databases
StackOverflow2013
Postsdbo
POIntegerSet in C++
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POIntegerSet in C++
    primarykey
    data
    text
    <p>I am having problems with an assignment. The assignment is to create an IntegerSet an IntegerSet is an array of 100 elements that represents the numbers from 0 to 99 for example if the number 5 is present in set a then <code>a[5] = 1</code>, an empty set is an array of zeroes.</p> <p>I created a class called IntegerSet and here is the code in integerSet.cpp</p> <pre><code>#include "integerset.h" #include &lt;iostream&gt; using std::cout; using std::endl; IntegerSet::IntegerSet(){ int temp[100] = {0}; set = temp; } IntegerSet::IntegerSet(int * setPtr) { set = setPtr; } void IntegerSet::insertElement(int toInsert) { if(toInsert &lt; 100 &amp;&amp; toInsert &gt;= 0) { set[toInsert] = 1; } } void IntegerSet::deleteElement(int toDelete) { if (toDelete &lt; 100 &amp;&amp; toDelete &gt;= 0 ) { set[toDelete] = 0; } } IntegerSet * IntegerSet::unionOfSets(IntegerSet * otherPtr) { int newSet[100] = {0}; for(int i = 0; i &lt; 100; i++ ) { if (this-&gt;set[i] == 1 || otherPtr-&gt;set[i] == 1) { newSet[i] = 1; } } return new IntegerSet(newSet); } IntegerSet * IntegerSet::intersectionOfSets(IntegerSet* otherPtr) { int newSet[100] = {0}; for(int i = 0; i &lt; 100 ; i++) { if(this-&gt;set[i] == 1 &amp;&amp; otherPtr-&gt;set[i] == 1){ newSet[i] = 1; } } return new IntegerSet(newSet); } bool IntegerSet::isEmpty(){ for(int i = 0 ; i &lt; 100 ; i++) { if(set[i] == 1) { return false; } } return true; } bool IntegerSet::isEqualTo(IntegerSet * otherPtr) { for(int i = 0; i &lt; 100 ; i++) { if(this-&gt;set[i] != otherPtr-&gt;set[i]) { return false; } } return true; } void IntegerSet::printSet() { if(isEmpty()) { cout &lt;&lt; "---" &lt;&lt; endl; } else { for(int i = 0; i &lt; 100 ; i++) { if(set[i] == 1) { cout &lt;&lt; i &lt;&lt; ' '; } } cout &lt;&lt; endl; } } IntegerSet::~IntegerSet() { delete[] set; } </code></pre> <p>The class has private member <code>int * set;</code>.</p> <p>This is the main function used to test my class:</p> <pre><code>#include &lt;iostream&gt; #include&lt;new&gt; #include "integerset.h" using std::cout; using std::endl; int main(int argc, char *argv[]) { IntegerSet * set1Ptr = new IntegerSet(); set1Ptr-&gt;insertElement(1); set1Ptr-&gt;insertElement(2); set1Ptr-&gt;insertElement(3); set1Ptr-&gt;insertElement(50); IntegerSet * set2Ptr = new IntegerSet(); set2Ptr-&gt;insertElement(0); set2Ptr-&gt;insertElement(3); set2Ptr-&gt;insertElement(2); set2Ptr-&gt;insertElement(51); set2Ptr-&gt;insertElement(100); set2Ptr-&gt;insertElement(99); IntegerSet * set3Ptr = set1Ptr-&gt;unionOfSets(set2Ptr); IntegerSet * set4Ptr = set1Ptr-&gt;intersectionOfSets(set2Ptr); cout &lt;&lt; "First Set" &lt;&lt; endl; set1Ptr-&gt;printSet(); cout &lt;&lt; "Second Set" &lt;&lt; endl; set2Ptr-&gt;printSet(); cout &lt;&lt; "Equal ? : " &lt;&lt; set1Ptr-&gt;isEqualTo(set2Ptr) &lt;&lt; endl; cout &lt;&lt; "Intersection : " &lt;&lt; endl; set4Ptr-&gt;printSet(); cout &lt;&lt; "Union : " &lt;&lt; endl; set3Ptr-&gt;printSet(); system("PAUSE"); return EXIT_SUCCESS; } </code></pre> <p>This the output I get when running</p> <pre><code>First Set 16 19 35 45 46 54 66 84 Second Set 0 1 10 12 13 14 19 35 45 46 54 66 84 Equal ? : 1 Intersection : 16 19 35 45 46 54 66 84 98 Union : 0 1 10 12 13 14 19 35 45 46 54 66 84 98 </code></pre> <p>I tried tracing and I have no idea what's wrong, so any help is really appreciated.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMat
    1. USA. H.
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POIntegerSet in C++
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POIntegerSet in C++
      1. This table or related slice is empty.
      1. VTUpMod
    1. COAre the pointers part of the assignment? main doesn't need any and the functions don't need to return any. Also, it seems like you're assigning a pointer to point to an array you create in your constructor. When your constructor ends, it will be a dangling pointer.
      singulars
      1. POIntegerSet in C++
      1. USchris
    2. COthanks for the quick response works now :)
      singulars
      1. POIntegerSet in C++
      1. USA. H.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload