How do you get a file in C++?

Question

So the teacher has posed this assignment:

You have been hired by the United Network Command for Law Enforcement, and you have been given files containing null cyphers yo

Answer 1

[EDIT] include support for command line arguments [EDIT] Fixed possible memory leak [EDIT] Fixed a missing reference

#include 
#include 

using namespace std;

int main(int argc, char *argv){
    ifstream infh;  // our file stream
    char *buffer;

    for(int c = 1; c < argc; c++){
        infh.open(argv[c]);

        //Error out if the file is not open
        if(!infh){
            cerr << "Could not open file: "<< argv[c] << endl;
            continue;
        }

        //Get the length of the file 
        infh.seekg(0, ios::end);
        int length = infh.tellg();

        //reset the file pointer to the beginning
        is.seekg(0, ios::beg);

        //Create our buffer
        buffer = new char[length];

        // Read the entire file into the buffer
        infd.read(buffer, length);

        //Cycle through the buffer, outputting every other char
        for(int i=0; i < length; i+= 2){
            cout << buffer[i]; 
        }
        infh.close();
    }
    //Clean up
    delete[] buffer;
    return 0;
}

Should do the trick. If the file is extremely large, you probably shouldn't load the entire file into the buffer.