Thread: Read the number of characters

Hi,
I want to count the number of characters in a text file and want to sore them in an array.(Remember its a file not a string).Thanxx

Something I wrapped up that should work..

Code:

#include <iostream>
#include <fstream>
#include <string>

const std::string file = "filename.txt";

// string that is going to contain the file's contents
std::string str = "";

int main(void) {
    // construct a datastream named fin to the specified file
    std::ifstream fin(file.c_str(), std::ios_base::in);

    // return false if the function couldn't write to file
    if (!fin.is_open()) 
        fin.clear();
        
    // temp variable used to contain each char
    char ch; 
    
    // variable that counts each character in the file
    int count = 0;   
        
    // loop trough each character in the file
    while (fin.get(ch)) {
        count++;
        str+=ch;
    }
    
    // show the amount of characters in the file
    std::cout << count;
    
    // show the contents which is stored in the std::string 'str'
    std::cout << std::endl << str;
        
    // close file output stream
    fin.close();

    return 0;
}

Originally Posted by rehan

Hi,
I want to count the number of characters in a text file and want to sore them in an array.(Remember its a file not a string).Thanxx

How about a vector instead?

Code:

#include <algorithm>
#include <iterator>
#include <fstream>
#include <iomanip>
#include <string>
#include <vector>

std::vector<char> load_file(const std::string &name)
{
   std::vector<char> output;
   std::ifstream input(name.c_str());
   input >> std::noskipws;
   std::copy(std::istream_iterator<char>(input),
             std::istream_iterator<char>(), std::back_inserter(output));
   return output;
}

This loads a file into a vector of char. The length of the file can be found by calling this vector's size() method.

Thanxx buddies,
Now i got it ,but i do not want to keep the spaces in my array.I mean i want to ignore the spaces and store the next character in the array instead of space.