Thread: Help with displaying a text file

Hi Guys,

I need some help with displaying a text file. I need to display the file 20 lines at a time, press C to continue Q to quit & have an option to print line numbers or not. I have the file printing and pausing at every 20 lines & I can get the line numbers to print out.

Where I'm having the problem is 1. the C for continue/Q for quit & 2. Only printing the line numbers when I choose to.

Heres my code so far.

Any help would be appreciated.

Code:

#include <stdio.h>
#include <stdlib.h>
#define MAX_CHARACTERS 81

main()
{

    FILE *fp_in;
    char one_line[MAX_CHARACTERS];
    int line_number = 1;
    char reply [81];
   


    if ( (fp_in=fopen("dt249.txt","r"))==NULL)
        puts("Error in opening dt249.txt" );

    else
        printf("Print line No's? (Y/N)\n");
        scanf("%s",&reply);


        while(fgets(one_line,MAX_CHARACTERS,fp_in )!=NULL )
      {
                if ( line_number %20== 0 );
                {
                printf(" %d %s ",line_number++,one_line);

                }
            
                if (line_number %20== 0)
                {
                printf("Press C/spacebar to continue or Q to quit");
                gets(reply);
                }

        }


        fclose(fp_in);
        printf("total line numbers = %d",line_number-1);
}