Thread: reading a text file printing line number

Hi guys i have done the following code and basically im trying to read a file and put line numbers to every line in the file. How would i read it in line by line then putting line numbers next to it. I have to use an Int for the lineNo's and int input_char variables i cant change them so im having difficulty finding a correct function to read them line by line which takes an int and not a char.

Code:

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

int main(int argc, char **argv)
{

    int line_no = 1;
    int input_char;
    FILE *fp;

    if(argc !=2) /* check for 2 arguments*/
    {

      fprintf(stderr, "invalid usage :%s\n", argv[0]);
      return 1; /* stop processing if failes */

    }

    if((fp = fopen(argv[1], "r")) == NULL) 
    /* opens file for reading and checks if it exists */
    {
     
     fprintf(stderr, "invalid usage: %s\n", argv[0]);
     return 1; /* stop processing if fails*/

    }

          printf("dude\n");

    while(fgetc(fp)!=NULL)
    {


          fprintf(fp, "%s", input_char);
          line_no++;

    }

       
    

    fclose(fp);



    return EXIT_SUCCESS;

}