Lex is a computer program that generates lexical analyzers and was written by Mike Lesk and Eric Schmidt. Lex reads an input stream specifying the lexical analyzer and outputs source code implementing the lexer in the C programming language.
Let’s the how to count the number of lines, spaces and tabs using Lex.
Input: Geeks for Geeks gfg gfg Output: No. of lines=2 No. of spaces=3 No. of tabs=1 No. of other characters=19 Input: Hello How are you? Output: No. of lines=2 No. of spaces=4 No. of tabs=1 No. of other characters=15
Below is the implementation:
- Lex program to take input from file and remove multiple spaces, lines and tabs
- Lex Program to print the total characters, white spaces, tabs in the given input file
- C Program to count number of lines in a file
- Program to print last 10 lines
- Lex Program to count number of words
- LEX program to count the number of vowels and consonants in a given string
- Removing spaces from a string using Stringstream
- Input an integer array without spaces in C
- How to use getline() in C++ when there are blank lines in input?
- Print 2D matrix in different lines and without curly braces in C/C++?
- How to write long strings in Multi-lines C/C++?
- Implement your own tail (Read last n lines of a huge file)
- Lex program to count words that are less than 10 and greater than 5
- Lex program to count the frequency of the given word in a file
- Lex Program to Identify and Count Positive and Negative Numbers
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to firstname.lastname@example.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.