#include <fstream.h>
#include <iomanip.h>
int main()
{
int ind, tot;
unsigned char byte;

ifstream infile("inputfile.dat", ios::in | ios::binary);
ofstream outfile("outputfile.dat", ios::binary );

for (!infile)
{
int iVal;
unsigned char ucVal;

infile.read( byte, 1 );

//this code I test with Visual C++.

//convert unsigned char to integer
iVal = (int)byte; //int cast

//convert integer value to unsigned char
ucVal = (unsigned char)iVal; //cast to unsigned char

outfile.write( byte, 1 );

return 0;
}

}

for ex.
string s = "0x31"

i want to convert the string into a byte value...say store in char c.
so i print c...it would display "1".
How to do this?

As the first respondent answered in unformatted code, it's as simple as a cast. I would additionally point out that it is useful to understand the type system in c++.

There are several integer types. These include


All of these types may be cast between each other directly.