Technical facts

Operating system(s) or programming environment(s)

Lubuntu 15.04 (vivid)

IDE(s):

Qt Creator 3.1.1

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.9.2

Libraries used:

STL: GNU ISO C++ Library, version 4.9.2

Qt project file: ./CppCfileExample1/CppCfileExample1.pro


include(../../ConsoleApplication.pri) #Or use the code below

# QT += core

# QT += gui

# greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

# CONFIG   += console

# CONFIG   -= app_bundle

# TEMPLATE = app

# CONFIG(release, debug|release) {

#   DEFINES += NDEBUG NTRACE_BILDERBIKKEL

# }

# QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++

# unix {

#   QMAKE_CXXFLAGS += -Werror

# }



SOURCES += main.cpp

./CppCfileExample1/main.cpp


#include <cassert>

#include <cstdio>

#include <memory>



//THIS PROGRAM MIGHT CAUSE A RUNTIME CRASH

//IT PROBABLY CORRUPTS SOME MEMORY

//DO NOT RUN IT!

//

//Sadly, I cannot remember why this was so...

int main()

{

  //Create a file to write to

  const std::unique_ptr<FILE> my_file(std::fopen("my_file.txt","w"));

  //Assume the file is created successfully

  assert(my_file);

  //Put text at the start of the file

  std::fputs("Bilderbickel",my_file.get());

  //Go to the 9th position

  std::fseek(my_file.get(),9,SEEK_SET );

  //Put text at the 9th position

  std::fputs ("k",my_file.get());

  //Close the file

  std::fclose (my_file.get());

}

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(C++) CfileExample1

Technical facts

Qt project file: ./CppCfileExample1/CppCfileExample1.pro

./CppCfileExample1/main.cpp