用C ++将字节写入ofstream

Question

I have char array, and i want to write it to txt file, but in bytes.

ofstream sw("C:\\Test.txt");
for(int i = 0; i < 256; i++)
{
  sw << (byte)myArray[i]; 
}

This will write chars into the file, but i want to write bytes. If there is char 'a' i want to write '97'. Thank you.

Answer 1

To write a byte or a group of bytes using std::fstream or std::ofstream, you use the write() function: std::ostream::write ()

const int ArraySize = 100;
Byte byteArray[ArraySize] = ...;

std::ofstream file("myFile.data");

if(file)
{
   file.write(&byteArray[0], ArraySize);
   file.write(&moreData, otherSize);
}

Answer 2

ofstream sw("C:\\Test.txt");
for(int i = 0; i < 256; i++)
{
  sw << (int)myArray[i]; 
}

This will convert a char 'a' to an int(or byte) value 97.