String Copying problems.

This is a discussion on String Copying problems. within the C++ Programming forums, part of the General Programming Boards category; Ok, here is the deal. I need a method to copy characters. Sounds simple, right? well, I can't seem to ...

  1. #1
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    May 2002
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    13

    String Copying problems.

    Ok, here is the deal. I need a method to copy characters. Sounds simple, right? well, I can't seem to be able to pull it off acurately.
    The problem is that my string I wish to copy has anywhere between 3 and 12 characters, and since this string is also a File name which i wish to load, accuracy is important.

    I can try this

    Char Filename[12];
    Char Lastname[12];

    cin.getline(Filename,12);
    strcpy(Lastname.Filename);

    and I get a "strcyp cannot convert 1 param from char to char *"

  2. #2
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    May 2002
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    And if someone could point me towards the syntax that allows you to copy the contents from file X to File y(overwriting file Y, but keeping the name) that would be great!

  3. #3
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    Guest
    First of all, with a full file name like "12345678.123" you will lose the last character. This is because getline(...) only reads n - 1 (in this case n == 12) characters to ensure there is space for the null terminator, which is how C/C++ knows where a string ends.

    Also, you should enter:
    strcpy(Lastname, Filename);

    Use commas to seperate parameters, not periods.

  4. #4
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    Join Date
    Apr 2002
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    249

    Re: String Copying problems.

    Originally posted by Red Army
    Code:
    Char Filename[12];
    Char Lastname[12];
    
    cin.getline(Filename,12);
    strcpy(Lastname.Filename); // it should be strcpy(Lastname,Filename);
    and I get a "strcyp cannot convert 1 param from char to char *" [/B]
    Check it..
    C++
    The best

  5. #5
    Registered User
    Join Date
    May 2002
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    317
    Code:
    #include <iostream>
    #include <fstream>
    
    using namespace std;
    
    int main(){
            fstream file;
            file.open("myfile.txt",ios:: out|ios:: binary); //open file
            file.seekp(0, ios::beg); //move put marker to begginning
            file.write(const char*, int count); /* write something, I just put the prototype here */
            file.close; //close file
            return(0); 
    }
    This will open a file and overwrite the contents.

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