Thread: Get the number of letters stored in a text file

  1. #1
    Registered User
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    Dec 2021
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    5

    Get the number of letters stored in a text file

    I have a text file with an unknown number of letters and I want to find the number of letters in it using fstream, how should I do it?
    I cant use getline and then find the number by counting, as I don't know the length of the array I should initialize.
    Plz Help
    Thanks!

  2. #2
    Registered User
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    Sep 2020
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    You don't need to store the text. You can read the file char by char and check if if is a letter.
    Code:
    #include <iostream>
    #include <fstream>
    
    
    int main()
    {
        if(std::ifstream input{__FILE__})
        {
            char ch;
            int letterCount = 0;
            
            while(input.get(ch))
            {
                // if ch is letter increment letterCount;
            }
            // output letterCount
        }
        else
            std::cerr << "Error opening file\n";        
    }
    BTW:
    C++ is not C where you need to allocate arrays or strings. std::string and std::vector will do this for you.
    Last edited by thmm; 02-16-2022 at 01:50 AM. Reason: Fixed formatting

  3. #3
    Registered User
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    Dec 2021
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    Thaaaaaankssss!!!

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