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lowerTriangle.cpp
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131 lines (117 loc) · 2.4 KB
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/**
* @file lowerTriangle.cpp
* @author Abhishek
* @brief Imlementation of lower triangle.
* @version 0.1
* @date 2022-04-27
*
* @copyright Copyright (c) 2022
*
*/
#include <iostream>
class Triangle
{
private:
int n;
int *Arr;
public:
Triangle(int d)
{
this->n = d;
Arr = new int[(d*(d+1))/2];
}
void set(int x, int r, int c);
void setColumnMajor(int x, int r, int c);
int get(int r, int c);
int getColumnMajor(int r, int c);
void display();
void displayColumnMajor();
};
void Triangle::set(int x, int r, int c)
{
if(r >= c )
Arr[((r*(r-1))/2+(c-1))] = x;
}
int Triangle::get(int r, int c)
{
if(r >= c)
return Arr[((r*(r-1))/2+(c-1))];
else
return 0;
}
void Triangle::setColumnMajor(int x, int r, int c)
{
if(r >= c )
{
int func = (n*(c-1)) - (((c-2)*(c-1))/2) + (r-c);
Arr[func] = x;
}
}
int Triangle::getColumnMajor(int r, int c)
{
if(r >= c)
{
int func = (n*(c-1)) - (((c-2)*(c-1))/2) + (r-c);
return Arr[func];
}
else
return 0;
}
void Triangle::display()
{
for(int i = 1; i <= n; i++)
{
for(int j = 1; j <= n; j++)
{
if(i < j)
std::cout << 0 << " ";
else
std::cout << Arr[((i*(i-1))/2+(j-1))] << " ";
}
std::cout << std::endl;
}
}
void Triangle::displayColumnMajor()
{
for(int i = 1; i <= n; i++)
{
for(int j = 1; j <= n; j++)
{
if(i < j)
std::cout << 0 << " ";
else
std::cout << Arr[(n*(j-1)) - (((j-2)*(j-1))/2) + (i-j)] << " ";
}
std::cout << std::endl;
}
}
int main(int argc, char const *argv[])
{
Triangle tt(3);
// tt.set(10, 1, 1);
// tt.set(20, 2, 1);
// tt.set(30, 2, 2);
// tt.set(40, 3, 1);
// tt.set(50, 3, 2);
// tt.set(60, 3, 3);
//------------------
tt.setColumnMajor(10, 1, 1);
tt.setColumnMajor(20, 2, 1);
tt.setColumnMajor(30, 2, 2);
tt.setColumnMajor(40, 3, 1);
tt.setColumnMajor(50, 3, 2);
tt.setColumnMajor(60, 3, 3);
/**
* 10 0 0
* 20 30 0
* 40 50 60
*/
//tt.display();
tt.displayColumnMajor();
/**
* 10 //row major
* 50 //column major
*/
std::cout << tt.getColumnMajor(3, 2);
return 0;
}