Thread: c program for sort and remove duplicate values from an array

Hi ,

I have a string array having a bunch of values. I need to sort this array, remove duplicate values from this array and reset the filtered array (without duplicate values) to a new array.

I am new to C programming. I have written some code, but it fails with a core dump always. Can some one please correct my code or send me an easy way to do this.

Thanks.

Code:

code snippet:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

main ()
{
int stat = 0;
int ctr = 4;
int inx = 0;
int status = 0;
int j = 0;
int k = 0;
int reset_count = 0;
char **lov_reset_values = 0;
char *str[] = { "test", "test1", "test2", "test" };

for ( inx = 0; inx < ctr; inx ++ )
{
printf ( "str[%d] = %s\n", inx, str[inx] );
}

for(j=0;j<ctr;j++)
{
status = 0;
for(k=1;k<=ctr;k++)
{
printf ( "entered after k= 0\n" );
if( strcmp (str[j],str[k] ) == 0 )
{
printf ( "matched\n" );
status = 1;
break;
}
}
if ( status == 0 )
{
if (reset_count == 0 )
{
printf ( "reset_count = 0\n" );
lov_reset_values = (char **)malloc( sizeof(char *));
}
else
{
printf ( "reset_count = %d\n", reset_count );
lov_reset_values = (char **)realloc( lov_reset_values, sizeof(char *)*(reset_count+1) );
}

lov_reset_values[reset_count] = (char *)malloc( sizeof( char )*(strlen(str[j])+1));
strcpy ( lov_reset_values[reset_count], (str)[j] );
printf ( "lov_reset_values[%d] = %s\n", reset_count, lov_reset_values[reset_count]);
reset_count = reset_count + 1;
}
}

printf (" reset_count = %d\n", reset_count );

/*
for ( inx = 0; inx < reset_count; inx++ )
{
printf ( "lov_reset_values[%d] = %s\n", inx, lov_reset_values[inx] );
}
*/

return stat;
}