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/******************************************************************************
Printing Total no of subsets and subsets of given set
*******************************************************************************/
#include<stdio.h>
#include<stdlib.h>
#include<ctype.h>
#include<math.h>
int arr[100][100];
int m,f;
int main()
{
int i,j;
printf("enter size of array:");
scanf("%d",&m);
f=pow(2,m);//Total no of subsets
for(i=0;i<f;i++)
bin(i);
int a[m];
printf("enter the elements:");
for(i=0;i<m;i++)
scanf("%d",&a[i]);
printf("Total no of subsets are:%d \n",f);
printf("Total subsets are:\n");
subsets(a);
}
void bin(unsigned n)//storing of binary numners into 2-D array
{
int k=0;
static int j=0;
unsigned i;
for(i=1<<(m-1);i>0;i=i/2)
{
if(n & i)
arr[j][k]=1;
else
arr[j][k]=0;
k++;
}
j++;
}
void subsets( int a[])//subset printing
{
int i,j;
for(i=0;i<f;i++)
{
for(j=0;j<m;j++)
{
if(arr[i][j]==1)
{
printf("%d",a[j]);
}
}
printf("\n");
}
}
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