file deduplicate lines unfinished

/* John Pfeiffer, 04jan08 put each line in a file into memory
*/

#include <stdio.h>
#include <stdlib.h>


#define LINE_BUFFER_MAX 512    512

int main(int argc, char* argv[])
{
    char unique_string[BUFFER_MAX];
    char buffer[BUFFER_MAX];
    FILE* fpsrc;
    FILE* fpdest;
    fpos_t place_in_file;
    int instance_count = 0;

    test_commandline_parameters( argc, argv );
    fpsrc = fopen(argv[1],"r");
    fpdest = fopen(argv[1],"w");

    if( (fpsrc == NULL) || (fpdest == NULL) )
    {    printf("Error opening file(s)\n"); }
    else
    {   
        /*while( fgets(buffer,1023,fpsrc != NULL ) */
        fgets(unique_string,511,fpsrc);
        {   
            instance_count=0;
            fgetpos(fpsrc, place_in_file);
            fseek(fptr, 0, SEEK_SET);

            while( fgets(buffer, 1023, fpsrc) != NULL )
            {   
                if( strcmp(unique_string,buffer) == 0   )
                {
                }/* end if */



            }/* end while */


        }/* end while */


    }/* end else */


    fclose(fp1);
    fclose(fp1);
    return 0;
}/* end main */

void test_commandline_parameters( int argc, char* argv[] )
{   int i = 0;
    if( (argc < CMDLINE_PARAMETERS) ||  (argc > CMDLINE_PARAMETERS) )
    {   printf("\nCorrect usage is:\n");    
        printf("%s inputfile outputfile",argv[0]); 
        exit(1);
    }   
    else
    {   while( i < argc )
        {   printf("%s ", argv[i]);     
            i++;
        }
        printf("in progress...\n\n");
    }   
}/* end test_commandline_paramters func */