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Program to create a 3-tuple from a given matrix

Posted By: Bourke Fischer     Category: C Programming     Views: 10662

Program to create a 3-tuple from a given matrix.

Code for Program to create a 3-tuple from a given matrix in C Programming

#include <stdio.h>
#include <conio.h>
#include <alloc.h>

#define MAX1 3
#define MAX2 3

struct sparse
{
    int *sp ;
    int row ;
} ;

void initsparse ( struct sparse * ) ;
void create_array ( struct sparse * ) ;
void display ( struct sparse ) ;
int count ( struct sparse ) ;
void create_tuple ( struct sparse *, struct sparse ) ;
void display_tuple ( struct sparse ) ;
void delsparse ( struct sparse * ) ;

void main( )
{
    struct sparse s1, s2 ;
    int c ;

    clrscr( );

    initsparse ( &s1 ) ;
    initsparse ( &s2 ) ;

    create_array ( &s1 ) ;
    printf ( "\nElements in Sparse Matrix: " ) ;
    display ( s1 ) ;

    c = count ( s1 ) ;
    printf ( "\n\nNumber of non-zero elements: %d", c ) ;

    create_tuple ( &s2, s1 ) ;
    printf ( "\n\nArray of non-zero elements: " ) ;
    display_tuple ( s2 ) ;

    delsparse ( &s1 ) ;
    delsparse ( &s2 ) ;

    getch( ) ;
}

/* initialises element of structure */
void initsparse ( struct sparse *p ) { p -> sp = NULL ; } /* dynamically creates the matrix of size MAX1 x MAX2 */
void create_array ( struct sparse *p ) { int n, i ; p -> sp = ( int * ) malloc ( MAX1 * MAX2 * sizeof ( int ) ) ; for ( i = 0 ; i < MAX1 * MAX2 ; i++ ) { printf ( "Enter element no. %d: ", i ) ; scanf ( "%d", &n ) ; * ( p -> sp + i ) = n ; } } /* displays the contents of the matrix */
void display ( struct sparse p ) { int i ; /* traverses the entire matrix */
for ( i = 0 ; i < MAX1 * MAX2 ; i++ ) { /* positions the cursor to the new line for every new row */
if ( i % MAX2 == 0 ) printf ( "\n" ) ; printf ( "%d\t", * ( p.sp + i ) ) ; } } /* counts the number of non-zero elements */
int count ( struct sparse p ) { int cnt = 0, i ; for ( i = 0 ; i < MAX1 * MAX2 ; i++ ) { if ( * ( p.sp + i ) != 0 ) cnt++ ; } return cnt ; } /* creates an array that stores information about non-zero elements */
void create_tuple ( struct sparse *p, struct sparse s ) { int r = 0 , c = -1, l = -1, i ; p -> row = count ( s ) + 1 ; p -> sp = ( int * ) malloc ( p -> row * 3 * sizeof ( int ) ) ; * ( p -> sp + 0 ) = MAX1 ; * ( p -> sp + 1 ) = MAX2 ; * ( p -> sp + 2 ) = p -> row - 1 ; l = 2 ; for ( i = 0 ; i < MAX1 * MAX2 ; i++ ) { c++ ; /* sets the row and column values */
if ( ( ( i % MAX2 ) == 0 ) && ( i != 0 ) ) { r++ ; c = 0 ; } /* checks for non-zero element
row, column and non-zero element value
is assigned to the matrix */
if ( * ( s.sp + i ) != 0 ) { l++ ; * ( p -> sp + l ) = r ; l++ ; * ( p -> sp + l ) = c ; l++ ; * ( p -> sp + l ) = * ( s.sp + i ) ; } } } /* displays the contents of 3-tuple */
void display_tuple ( struct sparse p ) { int i ; for ( i = 0 ; i < p.row * 3 ; i++ ) { if ( i % 3 == 0 ) printf ( "\n" ) ; printf ( "%d\t", * ( p.sp + i ) ) ; } } /* deallocates memory */
void delsparse ( struct sparse *p ) { free ( p -> sp ) ; }
  
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Bourke Fischer
Bourke Fischer author of Program to create a 3-tuple from a given matrix is from Frankfurt, Germany.
 
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