std::stringstream 输出与 std::string 不同

Question

i am currently working on a program whereby i can substitute alphabets in a text file(called plaintext.txt), along with a keyfile, and create a ciphertext when i run a command to mix them together. The working code is as shown below:

string text;
string cipherAlphabet;

string text = "hello";
string cipherAlphabet = "yhkqgvxfoluapwmtzecjdbsnri";

string cipherText;
string plainText;

bool encipherResult = Encipher(text, cipherAlphabet, cipherText);
bool decipherResult = Decipher(cipherText, cipherAlphabet, plainText);  

cout << cipherText;
cout << plainText;

Output for the above code will be below

fgaam
hello

However, i want to convert my "text" and "cipherAlphabet" into a string where i obtain the both of them through different text files.

string text;
string cipherAlphabet;


std::ifstream u("plaintext.txt"); //getting content from plainfile.txt, string is text
std::stringstream plaintext;
plaintext << u.rdbuf();
text = plaintext.str(); //to get text


std::ifstream t("keyfile.txt"); //getting content from keyfile.txt, string is cipherAlphabet
std::stringstream buffer;
buffer << t.rdbuf();
cipherAlphabet = buffer.str(); //get cipherAlphabet;*/

string cipherText;
string plainText;

bool encipherResult = Encipher(text, cipherAlphabet, cipherText);
bool decipherResult = Decipher(cipherText, cipherAlphabet, plainText);  

cout << cipherText;
cout << plainText;

However if i do this, i get no output and no error? Is there anyone out there that can help me with this please? Thank you!!

Answer 1

std::ifstream u("plaintext.txt"); //getting content from plainfile.txt, string is text std::stringstream plaintext; plaintext << u.rdbuf(); text = plaintext.str(); //to get text

When you use the above lines of code to extract text , you are getting any whitespace characters in the file too -- most likely a newline character. Simplify that block of code to:

std::ifstream u("plaintext.txt");
u >> text;

Same change needs to be done to read the cipher.

If you need to include the whitespaces but exclude the newline character, use std::getline .

std::ifstream u("plaintext.txt");
std::getline(u, text);

If you need to be able to deal with multiline text, you will need to change your program a bit.