Program: Finding the Total Number of Lines in a Text File

Problem Statement

Write a C program to find the total number of lines in a text file. Create a file containing some lines of text, open the file, use the fgetc function to parse characters until the end of the file (EOF), and increment a counter for each encountered EOF to determine the total number of lines. Display the total number of lines in the file as output.

Algorithm

1. Open File:

   • Open the text file using the fopen function.

   FILE *filePointer; filePointer = fopen("testfile.txt", "r");

   • Check if the file is successfully opened.

   if (filePointer == NULL) { // Handle file opening error }

2. Count Lines:

   • Initialize a counter to keep track of the lines.

   int lineCount = 0;

   • Use a loop to read characters from the file until the end of the file (EOF).

   int character; while ((character = fgetc(filePointer)) != EOF) { // Check for new line character if (character == '\n') { // Increment line count lineCount++; } }

3. Display Output:

   • Display the total number of lines as output.

   printf("Total number of lines: %d\n", lineCount);

4. Close File:

   • Always close the file after operations using the fclose function.

   fclose(filePointer);

Explanation

This program reads characters from a text file using fgetc until the end of the file is reached. While parsing, it checks for newline characters ('\n') and increments a counter for each occurrence. The final count represents the total number of lines in the file, which is then displayed as output.

This approach provides a simple way to determine the number of lines in a text file without using more advanced file reading techniques.

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