i am trying to write a program that takes information from a file and reads it and then does some kind of encryption, simple as adding one to it
I have it reading the file,
but how would i go about readings the characters as int's
and then adding a number to them?
example:
"Hi blah blah" = 234234 345634634 345345345 345345345
I want this to be stored in their number form + some number.
char data type is a small int whose value is between -126 and 127. So do do what you want just loop through the array and add 1 to the char value.
char str[] = "Hi blah blah";
// add 1 to the first character, syntax is idental to int
++str[0];Thanx, hmm but i still have one problem...
I need to read the text from a file.
So is there a way to read from the file and
then put that data into an array?
after reading the string from a text file to the encryption like I posted earlier. Do you know how to read files ? In c++ use the ifstream class to read a text file. Here is an example of how to read/write text files.
This is the code i have so far, which only displays "file.txt" and displays it.
#include<iostream>
#include<fstream>
using namespace std;
const int SIZEMAX = 81;
void read(fstream &);
int main()
{
fstream dataFile;
dataFile.open("file.txt", ios::in);
if(dataFile.fail())
{
cout << "The file does not exist. Please check your file."
<< endl;
return 0;
}
read(dataFile);
dataFile.close();
cout << endl << "Done" << endl;
return 0;
}
void read(fstream &file)
{
char line[SIZEMAX];
while( file >> line)
{
cout << line << endl;
}
}p.s. is there a way to tab in this chat box?
Well, this isn't really encryption, but I can't really figure out what you're trying to do to obtain the numbers. This just prints out the ASCII value for each character by casting to int.
int i = 0;
while(myString[i]) {
std::cout << static_cast<int>(myString[i]) << " ";
i++;
}
std::cout << std::endl;This code is fairly clear; it is trivial to modify it to fit into your read() function.
at line 42 add another loop to encrypt the line as suggested earlier then output the result to the screen as illustrated by joe.
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