C Program to count the number of lines in a file?

In this program, we are going to learn how to find the total number of lines available in a text file using C program?

This program will open a file and read the file’s content character by character and finally return the total number of lines in the file. To count the number of lines we will check the available Newline (\n) characters.

Input:
File "test.text"
   Hello friends, how are you?
   This is a sample file to get line numbers from the file.
Output:
Total number of lines are: 2

Explanation

This program will open a file and read the file’s content character by character and finally return the total number of lines in the file. To count the number of lines we will check the available Newline (\n) characters. This will check all the new line and count then and return the count.

Example

#include<iostream>
using namespace std;
#define FILENAME "test.txt"
int main() {
   FILE *fp;
   char ch;
   int linesCount=0;
   //open file in read more
   fp=fopen(FILENAME,"r");
   if(fp==NULL) {
      printf("File \"%s\" does not exist!!!\n",FILENAME);
      return -1;
   }
   //read character by character and check for new line
   while((ch=fgetc(fp))!=EOF) {
      if(ch=='\n')
         linesCount++;
   }
   //close the file
   fclose(fp);
   //print number of lines
   printf("Total number of lines are: %d\n",linesCount);
   return 0;
}

Sudhir sharma

Published on 20-Aug-2019 08:49:43

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