How Do I Correctly Write a std::string to a File in C ?

File Writing with std::string: Unbox the Mysteries

When attempting to write a std::string to a file, users may encounter unexpected results of boxes or corrupted characters. This issue arises from writing the binary data of the string, which contains a pointer and the string length, instead of the actual characters.

For text files, the appropriate solution is to employ an ofstream, which operates like std::cout but directs output to a file. Consider the following example:

#include <fstream>
#include <string>

int main() {
    std::string input;
    std::cin >> input;
    std::ofstream out("output.txt");
    out << input;
    out.close();
    return 0;
}

However, if binary data is necessary, the actual string characters should be used. This can be achieved using string::c_str():

write.write(studentPassword.c_str(), studentPassword.size());

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