C Exercises: Return only the unique rows from a given binary matrix

C Array: Exercise-72 with Solution

Write a program in C to return only the unique rows from a given binary matrix.

Sample Solution:

C Code:

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#define R 4
#define C 5

typedef struct Node
{
    bool chkEndOfCol;
    struct Node *child[2]; 
} myNode;
myNode* newNode()
{
    myNode* temp = (myNode *)malloc( sizeof( myNode ) );
    temp->chkEndOfCol = 0;
    temp->child[0] = temp->child[1] = NULL;
    return temp;
}
bool insert( myNode** root, int (*arr1)[C], int r, int c )
{
    if ( *root == NULL )
        *root = newNode();
    if ( c < C )
        return insert ( &( (*root)->child[ arr1[r][c] ] ), arr1, r, c+1 );
    else 
    {
        if ( !( (*root)->chkEndOfCol ) )
            return (*root)->chkEndOfCol = 1;
        return 0;
    }
}
void printRow( int (*arr1)[C], int r )
{
    int i;
    for( i = 0; i < C; ++i )
        printf( "%d ", arr1[r][i] );
    printf("\n");
}
void findUniqueRows( int (*arr1)[C] )
{
    myNode* root = NULL; 
    int i;
	printf("The unique rows of the given array are :  \n");	
    for ( i = 0; i < R; ++i )
        if ( insert(&root, arr1, i, 0) )
            printRow( arr1, i );
}
int main()
{
    int arr1[R][C] = 
		{{0, 1, 0, 0, 1},
        {1, 0, 1, 1, 0},
        {0, 1, 0, 0, 1},
        {1, 0, 1, 0, 0}
    };
	int i,j;
 //------------- print original array ------------------	
	printf("The given array is :  \n");
	for(i = 0; i < R; i++)
	{
	for (j=0;j<C;j++)
	{
	printf("%d  ", arr1[i][j]);
    } 
	printf("\n");
	}
//------------------------------------------------------ 	
	
    findUniqueRows( arr1 );
    return 0;
}

Sample Output:

The given array is :  
0  1  0  0  1  
1  0  1  1  0  
0  1  0  0  1  
1  0  1  0  0  
The unique rows of the given array are :  
0 1 0 0 1 
1 0 1 1 0 
1 0 1 0 0

Flowchart:

C Programming Code Editor:

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