C
#include <stdio.h>
int main()
{
int n = 5;
int i,j;
int x = 1, y = n;
int t1,t2;
int r1,r2;
for(i = n; i >= 1; i--)
{
t1 = x;
t2 = y;
r1 = i;
r2 = i + 1;
for (j = n; j >= i; j--)
{
if ((i + j) % 2 == 1)
{
printf("%2d ", t1);
}
else
{
printf("%2d ", t2);
}
t1 = t1 - r1++;
t2 = t2 - r2++;
}
y = y + i - 1;
x = x + i;
printf("\n");
}
return 0;
}
C++
#include <iostream.h>
int main()
{
int n = 5;
int x = 1, y = n;
int t1,t2;
int r1,r2;
for(int i = n; i >= 1; i--)
{
t1 = x; t2 = y;
r1 = i; r2 = i + 1;
for(int j = n; j >= i; j--)
{
if ((i + j) % 2 == 1)
{
cout<<t1<<" ";
}
else
{
cout<<t2<<" ";
}
t1 = t1 - r1++;
t2 = t2 - r2++;
}
y = y + i - 1;
x = x + i;
cout<<endl;
}
return 0;
}
Java
class PatternProg
{
public static void main(String args[])
{
int n = 5;
int x = 1;
int y = n;
int t1;
int t2;
int r1;
int r2;
for (int i = n; i >= 1; i--)
{
t1 = x;
t2 = y;
r1 = i;
r2 = i + 1;
for (int j = n; j >= i; j--)
{
if ((i + j) % 2 == 1)
{
System.out.printf("%2d ",t1);
}
else
{
System.out.printf("%2d ",t2);
}
t1 = t1 - r1++;
t2 = t2 - r2++;
}
y = y + i - 1;
x = x + i;
System.out.println();
}
}
}
C#
using System;
class PatternProg
{
public static void Main()
{
int n = 5;
int x = 1;
int y = n;
int t1;
int t2;
int r1;
int r2;
for (int i = n; i >= 1; i--)
{
t1 = x;
t2 = y;
r1 = i;
r2 = i + 1;
for (int j = n; j >= i; j--)
{
if ((i + j) % 2 == 1)
{
Console.Write("{0,2:D} ", t1);
}
else
{
Console.Write("{0,2:D} ", t2);
}
t1 = t1 - r1++;
t2 = t2 - r2++;
}
y = y + i - 1;
x = x + i;
Console.WriteLine();
}
Console.ReadKey(true);
}
}
Python
n = 5
d = 1
e = n
for x in range(n, 0, -1):
t1 = d
t2 = e
r1 = x
r2 = x + 1
for y in range(n, x - 1, -1):
if (x + y) % 2 == 1:
print("{:2d} ".format(t1), end="")
else:
print("{:2d} ".format(t2), end="")
t1 = t1 - r1
t2 = t2 - r2
r1 = r1 + 1
r2 = r2 + 1
e = e + x - 1
d = d + x
print()