How do i construct the getline method in C

I've just constructed a program which reads number of lines in a file.The thing is i've got a problem constructing the getline method.I've already constructed part of the program.When i compile the program, it gives me the name of the file.

I would be very glad if you could help me. The program is as follows :


#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAXLINE 1000

/*--------------------------Clear Method--------------------------------
 * This methos clears the screen
 */
void clear()
 {
  printf("                                 ");
 }

 int getline( FILE *fp, char *line, int max);

/*---------------------main----------------------------
 * this is the main part of the program which calls the
 * getline method to count number of lines in a file
 */222
main(int argc, char *argv[])
{
  char *filename = "input.dat";
  FILE *fp;
  char line[MAXLINE];
  int found = 0;

 
   fp = fopen(filename, "r");
    if(fp == NULL)
         {
          fprintf(stderr, "can't open %s\n", filename);
          exit(EXIT_FAILURE);
         }

    if (argc != 2)
      printf("Usage: find pattern\n");
    else
      while(getline(fp, line, MAXLINE) > 0)
       if (strstr(line, argv[1]) != NULL)
       {
         printf("%s", line);
         found++;
       }
       
    return found;
}