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Spiral_matrix.cpp
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Spiral_matrix.cpp
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/*
*
* Program to load an array dynamically and then to display the elements in a spiral
*
*
* Author : Harikrishnan Subash
*
* Date : August 30th , 2014
*
*
*
* */
#include<iostream>
using namespace std;
void spiralPrint()
{
// Algorithm Test Case
// int m=0,n=0,M=4,N=1,i,j;
// int array[4][1]={1,2,3,4};
int **array;
int i,j,M,N,m,n;
cout<<"Enter the number of rows and columns :";
cin>>M>>N;
array =new int *[M];
for(i=0;i<M;i++)
{
array[i]=new int[N];
}
cout<<"Enter the elements :"<<endl;
for(i=0;i<M;i++)
{
for(j=0;j<N;j++)
{
cin>>array[i][j];
}
}
cout<<"\nEntered Matrix "<<endl;
for(i=0;i<M;i++)
{
for(j=0;j<N;j++)
{
cout<<array[i][j]<<" ";
}
cout<<endl;
}
cout<<"\n -------------- SPIRAL ---------------------\n";
m=0;
n=0;
while(m<M && n<N)
{
for(i=n;i<N;i++)
{
cout<<array[m][i]<<" ";
}
m++;
for(i=m;i<M;i++)
{
cout<<array[i][N-1]<<" ";
}
N--;
if(m<M)
{
for(i=N-1;i>=n;i--)
{
cout<<array[M-1][i]<<" ";
}
M--;
}
if(n<N)
{
for(i=M-1;i>=m;i--)
{
cout<<array[i][n]<<" ";
}
n++;
}
};
}
int main()
{
spiralPrint();
return 0;
}