c program to count number of lines in a file

c program to count number of lines in a file, Number of lines in given text file

#include     
  
 void main()   
 {  
    FILE *fopen(), *fp;   
    int c , nc, nlines;   
    char filename[40] ;  
    nlines = 0 ;   
    nc = 0;    
    printf("Enter the file name: ");   
    gets( filename );   
    fp = fopen( filename, "r" );       
    if ( fp == NULL )   
    {   
        printf("Sorry Cannot open %s for reading \n", filename );   
        exit(1);      /* End program */   
    }    
    c = getc( fp ) ;           
    while (  c != EOF )   
    {   
        if ( c  ==  '\n'  )   
        nlines++ ;   
        nc++ ;    
        c = getc ( fp );   
    }   
    fclose( fp );    
    if ( nc != 0 )   
    {   
        printf("There are %d characters in %s \n", nc, filename );   
        printf("There are %d lines \n", nlines );   
    }   
    else  
    {      
        printf("Ohh.h....File: %s is empty \n", filename );   
    }  
 }