Use istrstream to read int, float and char : istrstream « File Stream « C++ Tutorial

1. C++ Tutorial
2. File Stream
3. istrstream

#include <iostream>
#include <strstream>
using namespace std;

int main()
{
  char s[] = "10 Hello 0x75 42.73 OK";

  istrstream ins(s);

  int i;
  char str[80];
  float f;

  // reading: 10 Hello
  ins >> i;
  ins >> str;
  cout << i << " " << str << endl;

  // reading 0x75 42.73 OK
  ins >> hex >> i;
  ins >> f;
  ins >> str;

  cout << hex << i << " " << f << " " << str;

  return 0;
}

10 Hello
75 42.73 OK"