add binary file handling

Author: tbhaxor

BinaryFile/CMakeLists.txt

@@ -0,0 +1,4 @@
+project(BinaryFile)
+
+
+add_executable(${PROJECT_NAME} main.cpp student.hpp student.cpp)

BinaryFile/main.cpp

@@ -0,0 +1,47 @@
+#include "student.hpp"
+#include <fstream>
+#include <ios>
+#include <iostream>
+#include <string>
+
+int main(int argc, char **argv) {
+  if (argc < 3) {
+    std::cerr << "usage: " << argv[0] << " <name> <age>\n";
+    return 0x0;
+  }
+
+  std::ofstream *ofile = new std::ofstream();
+  std::ifstream *ifile = new std::ifstream();
+
+  ofile->open("student.dat", std::ios::binary | std::ios::trunc);
+
+  // setup student object
+  Student *student = new Student();
+  student->setAge((unsigned short)std::stoul(argv[2]));
+  student->setName(argv[1]);
+
+  ofile->write(reinterpret_cast<char *>(student), sizeof(*student));
+  ofile->close();
+
+  ifile->open("student.dat", std::ios::binary);
+  if (ifile->is_open()) {
+    Student *s = new Student();
+    while (!ifile->eof()) {
+      ifile->read(reinterpret_cast<char *>(s), sizeof(Student));
+      std::cout << s->whoami() << std::endl;
+    }
+  } else {
+    std::cerr << "Unable to open file\n";
+  }
+
+  ifile->close();
+
+  delete ifile;
+  delete ofile;
+  delete student;
+  ifile = nullptr;
+  ofile = nullptr;
+  student = nullptr;
+
+  return 0x0;
+}

BinaryFile/student.cpp

@@ -0,0 +1,16 @@
+#include "student.hpp"
+#include <sstream>
+#include <string>
+
+void Student::setAge(int age) { this->age = age; }
+void Student::setAge(short age) { this->age = age; }
+void Student::setAge(unsigned short age) { this->age = age; }
+
+void Student::setName(std::string &name) { this->name = name; }
+void Student::setName(const char *name) { this->name = std::string(name); }
+
+std::string Student::whoami() const {
+  std::stringstream s;
+  s << "I am " << this->name << " and " << this->age << " years old";
+  return s.str();
+}

BinaryFile/student.hpp

@@ -0,0 +1,17 @@
+#include <string>
+
+class Student {
+private:
+  std::string name;
+  unsigned short age;
+
+public:
+  void setAge(int age);
+  void setAge(short age);
+  void setAge(unsigned short age);
+
+  void setName(std::string &name);
+  void setName(const char *name);
+
+  std::string whoami() const;
+};

CMakeLists.txt

@@ -10,4 +10,5 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
 add_subdirectory(WritingFile)
 add_subdirectory(ReadingFile)
-add_subdirectory(AppendingFile)
+add_subdirectory(AppendingFile)
+add_subdirectory(BinaryFile)