Question

In C++ Make a program that takes a positive integer 'n' and write an n x n matrix whose entries are listed as snail

Example: (See picture) for n=6

Ej. Para n-6 2 2 2 20 21 22 23 24 7 19 32 33 34 258 18 31 36 35 26 9 17 30 29 28 27 10 16 15 14 13 12 11

Answer 1

#include<iostream>
using namespace std;
int main()
{
int n;
int i, j = 0, k = 1;
cout<<"\n Enter a positive integer: ";
cin>>n;
int size = n, matrix[n][n];
while(k <= n * n)
{
for(i = j; i < size; i++)
{
matrix[j][i] = k++;
}
for(i = j + 1; i < size; i++)
{
matrix[i][size - 1] = k++;
}
for(i = size - 2; i >= j; i--)
{
matrix[size - 1][i] = k++;
}
for(i = size - 2; i > j; i--)
{
matrix[i][j] = k++;
}
j++, size = size - 1;
}
if(!n % 2)
{
matrix[(n + 1) / 2] [(n + 1) / 2] = n * n;
}
for(i = 0; i < n; i++)
{
for(int l = 0; l < n; l++)
{
cout<<matrix[i][l] <<"\t";
}
cout<<"\n";
}
return 0;
}

OUTPUT

Enter a positive integer: 6
1 2 3 4 5 6
20 21 22 23 24 7
19 32 33 34 25 8
18 31 36 35 26 9
17 30 29 28 27 10
16 15 14 13 12 11