#include <stdio.h>
#include <string>
#include <windows.h>
#include <wininet.h>
#include <winuser.h>
#include <conio.h>
#include <time.h>
#include <fstream>
#include <strsafe.h>
#include <io.h>
#include <crtdefs.h>
#include <fstream>
#include <GdiPlus.h>
#include <lmcons.h>

//char acUserName[100];

using namespace Gdiplus;
using namespace std;

fstream err("errormul.txt",ios::app);
fstream log_error_file("log_error.txt",ios::app);

#pragma comment(lib, "user32.lib") 
#pragma comment(lib,"Wininet.lib")
#pragma comment (lib,"gdiplus.lib")

void screenshot(string file){
	ULONG_PTR gdiplustoken;
	GdiplusStartupInput gdistartupinput;
	GdiplusStartupOutput gdistartupoutput;

	gdistartupinput.SuppressBackgroundThread = true;
	GdiplusStartup(& gdiplustoken,& gdistartupinput,& gdistartupoutput); //start GDI+

	HDC dc=GetDC(GetDesktopWindow());//get desktop content
	HDC dc2 = CreateCompatibleDC(dc);	 //copy context

	RECT rc0kno;  // rectangle  Object

	GetClientRect(GetDesktopWindow(),&rc0kno);// get desktop size;
	int w = rc0kno.right-rc0kno.left;//width
	int h = rc0kno.bottom-rc0kno.top;//height

	HBITMAP hbitmap = CreateCompatibleBitmap(dc,w,h);  //create bitmap
	HBITMAP holdbitmap = (HBITMAP) SelectObject(dc2,hbitmap);

	BitBlt(dc2, 0, 0, w, h, dc, 0, 0, SRCCOPY);  //copy pixel from pulpit to bitmap
	Bitmap* bm= new Bitmap(hbitmap,NULL);

	UINT num;
	UINT size;

	ImageCodecInfo *imagecodecinfo;
	GetImageEncodersSize(&num,&size); //get count of codec

	imagecodecinfo = (ImageCodecInfo*)(malloc(size));
	GetImageEncoders (num,size,imagecodecinfo);//get codec

	CLSID clsidEncoder;

	for(int i=0; i < num; i++)
	{
		if(wcscmp(imagecodecinfo[i].MimeType,L"image/jpeg")==0)
			clsidEncoder = imagecodecinfo[i].Clsid;   //get jpeg codec id

	}

	free(imagecodecinfo);

	wstring ws;
	ws.assign(file.begin(),file.end());  //sring to wstring
	bm->Save(ws.c_str(),& clsidEncoder);   //save in jpeg format
	SelectObject(dc2,holdbitmap);  //Release Objects
	DeleteObject(dc2);
	DeleteObject(hbitmap);

	ReleaseDC(GetDesktopWindow(),dc);
	GdiplusShutdown(gdiplustoken);

}

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int CmdShow)
{
	while(true){
	SYSTEMTIME st;  // create object of system time 
	GetLocalTime(&st);
	int year = st.wYear;  // extract year from system time
	int month = st.wMonth; // extract month from system time
	int day = st.wDay; // extract year day system time
	int hour = st.wHour; // extract year hours system time
	int mintue = st.wMinute; // extract mintue from system time

	string yearS =  to_string(year);
	yearS += "_";
	string monthS =  to_string(month);
	monthS += "-";
	string dayS =  to_string(day);
	dayS += "-";
	string hourS =  to_string(hour);
	hourS += "H-";
	string mintueS =  to_string(mintue);
	mintueS += "M.jpg";

	string startDate;
	startDate =dayS + monthS + yearS + hourS + mintueS;  // create complete string of date and time
	
	screenshot(startDate);   // send string to screenshot function
	Sleep(1000*30*1);  // delay execution of function 60 Seconds
	}
}
 

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

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

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
} 

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
} 

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}  

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition); 

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}