Visual C++ - Sample Queue With Template and Regular Sorting
I have given here the source code in Visual C++ for Queue (First In First Out). I have used templates. For dynamic memory allocation, I have used malloc, realloc and free functions.
The other links for Visual C++ is,
Visual C++ - Sample Queue With Template and Regular Sorting
Turbo C++ - Sample Queue With Template and Regular Sorting
I have given here the code for regular sorting. The actual sorting using queue technique is given at the following links:
Turbo C++ - Applying Queue Technique for Rail Road Car Rearrangement
Visual C++ - Applying Queue Technique for Rail Road Car Rearrangement
Source Code
#include <iostream>
template<class T>
class MyQueue
{
T *m_data;
int m_numElements;
public:
MyQueue() : m_data(NULL), m_numElements(0) { }
~MyQueue()
{
free(m_data);
m_data = NULL;
m_numElements = 0;
}
bool push(T data)
{
if(m_data == NULL) // root node
{
m_numElements = 1;
m_data = (T*) malloc(sizeof(T));
}
else
{
m_numElements++;
m_data = (T*) realloc(m_data, m_numElements * sizeof(T));
}
m_data[m_numElements - 1] = data;
return true;
}
bool pop()
{
if(m_data == NULL) // root node
{
return false;
m_numElements = 0;
}
else
{
if(m_numElements == 1)
{
// last item
m_numElements = 0;
free(m_data);
m_data = NULL;
}
else
{
m_numElements--;
memmove(m_data, &m_data[1], m_numElements * sizeof(T));
m_data = (T*) realloc(m_data, m_numElements * sizeof(T));
}
}
return true;
}
T front()
{
if(m_numElements > 0)
return m_data[0];
}
int size()
{
return m_numElements;
}
bool Sort()
{
for(int i = 1; i < m_numElements; i++)
{
for(int j = 0; j < m_numElements - i; j++)
{
if(m_data[j] > m_data[j + 1])
{
T temp = m_data[j];
m_data[j] = m_data[j + 1];
m_data[j + 1] = temp;
}
}
}
return true;
}
};
int main()
{
MyQueue<char> q1;
MyQueue<int> q2;
char inpstring[] = "581742963";
int inpNumbers[] = { 22, 10, 12, 32, 62, 42, 52, 92, 82, 72 };
for(int i = 0; i < sizeof(inpstring) / sizeof(char) - 1; i++)
q1.push(inpstring[i]);
for(int i = 0; i < sizeof(inpNumbers) / sizeof(int); i++)
q2.push(inpNumbers[i]);
q1.Sort();
q2.Sort();
int sz1 = q1.size();
int sz2 = q2.size();
std::cout << "\n\nSorted Queue<Char>\n\n";
for(int i = 0; i < sz1; i++)
{
std::cout << q1.front();
q1.pop();
}
std::cout << "\n";
std::cout << "\n\nSorted Queue<int>\n\n";
for(int i = 0; i < sz2; i++)
{
std::cout << q2.front() << "\n";
q2.pop();
}
std::cout << "\n";
return 0;
}
Click here to download Visual C++ Source Code and Executable
Output
Sorted Queue<Char>
123456789
Sorted Queue<int>
10
12
22
32
42
52
62
72
82
92
Press any key to continue . . .
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