Command Line Argument C Program

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])   //  command line arguments
{
if(argc!=5)
{
   printf("Arguments passed through command line " \
          "not equal to 5");
   return 1;
}

   printf("\n Program name  : %s \n", argv[0]);
   printf("1st arg  : %s \n", argv[1]);
   printf("2nd arg  : %s \n", argv[2]);
   printf("3rd arg  : %s \n", argv[3]);
   printf("4th arg  : %s \n", argv[4]);
   printf("5th arg  : %s \n", argv[5]);

return 0;
getch();
}

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C program to copy contents of one file to another file

#include <stdio.h>
#include <stdlib.h> // For exit()

int main()
{
    FILE *fptr1, *fptr2;
    char filename[100], c;

    printf("Enter the filename to open for reading \n");
    scanf("%s", filename);

    // Open one file for reading
    fptr1 = fopen(filename, "r");
    if (fptr1 == NULL)
    {
        printf("Cannot open file %s \n", filename);
        exit(0);
    }

    printf("Enter the filename to open for writing \n");
    scanf("%s", filename);

    // Open another file for writing
    fptr2 = fopen(filename, "w");
    if (fptr2 == NULL)
    {
        printf("Cannot open file %s \n", filename);
        exit(0);
    }

    // Read contents from file
    c = fgetc(fptr1);
    while (c != EOF)
    {
        fputc(c, fptr2);
        c = fgetc(fptr1);
    }

    printf("\nContents copied to %s", filename);

    fclose(fptr1);
    fclose(fptr2);
    return 0;
}

Output: 

Enter the filename to open for reading
a.txt
Enter the filename to open for writing
 b.txt
Contents copied to b.txt

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Google announces massive reorganization, becomes subsidiary of umbrella corporation Alphabet

Google on Monday announced a major reorganization and management shuffle that includes a new holding company called Alphabet (http://abc.xyz) as well as a new CEO for Google.
Google has grown from its beginnings as a search engine to a sprawling company that has its hands in all sorts of tech-related projects. The company is operating well, notes co-founder Larry Page, but it could be cleaner and more accountable. That’s where Alphabet comes in.
In a post on Alphabet’s website, Page explained that Alphabet is a collection of companies, its largest being Google. Or in other words, Google is now one of many wholly-owned subsidiaries of Alphabet.

The overall idea is to slim down Google by aggregating its many ventures under a single umbrella corporation. Such ventures include the Life Sciences division that’s working on their glucose-sensing contact lens and Calico, the company started in late 2013 with a focus on extending life expectancy. Alphabet will also include the Google X lab, its top-secret moonshot incubator.
Page will serve as Alphabet CEO alongside fellow Google co-founder Sergey Brin who will serve as president. Together, the two will handle capital allocation among its umbrella companies, select the appropriate CEOs for each division, determine their compensation and so on. The duo have promoted veteran Sundar Pichai to fill the role of Google CEO.
Alphabet will replace Google as a publically-traded entity. All shares of Google will automatically convert to shares of Alphabet although the two classes of shares will continue to trade under the ticker symbols GOOGL and GOOG.
Page said they believe that over time, companies tend to get comfortable doing the same thing, just making incremental changes. But in the tech industry where revolutionary ideas drive the next big growth areas, one needs to be a bit uncomfortable to stay relevant.
Alphabet may help them do just that.

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Windows 10 vs. Windows 8.1 vs. Windows 7 Performance

Three years ago we were benchmarking Microsoft's then latest operating system, Windows 8. At the time we were keen to make sure Windows 8 performed as well as Windows 7, which was a huge upgrade from 2006's Windows Vista.
In the end, we determined that Windows 8 was on par with 7 and at times a fraction faster, leading us to this conclusion in our performance review:
"Looking beyond benchmarks, Windows 8 appears more polished than Windows 7, even if you plan to live on the desktop and aren't too fond of the Start screen, general usage is smoother and appears to be faster on Windows 8, which I found most noticeable on our somewhat underpowered Athlon II X4 system. If anything, it's a great start. Now the Metro/Modern style will have to prove itself as a cross-platform OS that marries desktop, laptop and tablet PCs."
It's obvious now that the 'Metro' Start screen was an epic failure and in my opinion it was the only real issue with Windows 8, as I thoroughly enjoyed using the operating system with Classic Shell installed.
Fortunately, Microsoft learned from its mistakes and addressed some of Windows 8's shortcomings in Windows 10, which we believe is the best version yet, if only for its improved looks and functionality across devices and form factors.

After running the beta for months, I installed Windows 10 on launch day with the impression that it was relatively fast and stable, though it remained to be seen precisely how fast it was compared to Windows 8.1 and the beloved Windows 7.
That's what we plan to find out today as we test various aspects of the operating system including boot up and shutdown times, file copying, encoding, browsing, gaming and some synthetic benchmarks.

Test System Specs

All three operating systems were tested using a fresh install with all the updates applied and then our test software installed. The exact same hardware was used for each configuration with the only difference being the OS used.

• Intel Core i5-4670K (3.4GHz - 3.8GHz)
• Asrock Z97 Extreme6
• 8GB DDR3-2400 RAM
• Nvidia GeForce GTX 980
• Crucial MX200 1TB
• SilverStone Essential Gold 750w
• Windows 7, Windows 8.1, Windows 10 Pro 64-bit

Boot, Sleep & Hibernate Performance

Using BootRacer we measured the time it took for Windows to boot. Windows 8.1 delivered the best result taking just four seconds opposed to six seconds on Windows 10, from the Windows logo to usable desktop.
Manually measuring boot time with a stopwatch delivered similar results, though in realistic terms I struggled to find real differences, with the three operating systems just one or two seconds apart from each other on a fresh install.
Surely these results will vary depending on hardware used, configuration and state of the operating system after months of use, patching and third party apps taking its inevitable toll. We know our hardware was identical for all three OS configurations, so with this setup Windows 10 does appear slightly slower at booting.

Here we measured the time it takes for the system to wake up from sleep. The test stops the moment the desktop is loaded and we induced sleep with a custom shortcut.
Windows 7 takes quite long to wake from sleep -- 17 seconds on average. Windows 8.1 is considerably faster taking just 12 seconds, though Windows 10 was able to improve on this shaving off an additional 2 seconds.
Editor's note (Update): Many readers have pointed out how slow these wake up from sleep times are compared to your laptop where either version wakes up almost instantaneously. The reason is that we ran all tests in a desktop PC, where Windows defaults to Hybrid Sleep. Hybrid sleep is a combination of sleep and hibernate meant to prevent users from losing work in case of a power failure.

The wake up from hibernation results are similar to wake from sleep. Here Windows 10 took just 21 seconds, while Windows 8.1 was slightly slower taking 23 seconds and then Windows 7 at 27 seconds.

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Fingerprint scanners on Android phones are far less secure than on iPhones

The Samsung Galaxy S5's fingerprint reader security vulnerabilities were well documented over a year ago. But if you were hoping the world’s most popular Android device manufacturer had mended its exposure to easy hacks since then,recent Black Hat revelations will come as a disappointing surprise.

During the esteemed and anxiety-inducing security convention, FireEye researchers Tao Wei and Yulong Zhang presented a summary of known issuespertaining to mobile devices capable of recognizing fingerprints.

The Galaxy S5 and HTC One Max in particular fared poorly; both were vulnerable to a "fingerprint sensor spying attack" that could remotely lift prints from the phones because neither manufacturer fully lock down the sensor.

As the report points out, “the leakage of fingerprints is irredeemable”, so once hacked the target might lose control of passwords, personal data and, most vexing of all, mobile payment access for good. A seasoned cyber-criminal can also carefully cover their tracks so as to loot fingerprints from several smartphone users over a period of time.

Samsung, HTC and Huawei are now aware of the flaw and have already begun updating their software. Meanwhile, Apple's Touch ID sensor was deemed "far more secure" as it encrypts fingerprint data from the scanner.

"Even if the attacker can directly read the sensor, without obtaining the crypto key, [the attacker] still cannot get the fingerprint image," Zhang noted.

Hopefully, Google will take a page from Apple’s playbook when wrapping upAndroid M, the platform’s first build endowed with native fingerprint capabilities.

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C program to Calculate Factorial of a Number Using ...

#include<stdio.h>

#include<conio.h>

void main()

{

int a,f=1,i;

clrscr();

printf("Factorial i : ");

scanf("%d",&i);

for(a=1;a<=i;a++)

{

f=f*a;

}

printf("ANS %d = %d ",i,f);

getch();

}

Output:

Factorial i : 3

ANS 3 = 6

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FIND FACTORIAL OF A NUMBER USING RECURSION IN C PROGRAM

#include<stdio.h>
#include<conio.h>
int fact(int);
void main()
{
  int num,f;
  clrscr();
  printf("\nEnter a number: ");
  scanf("%d",&num);
  f=fact(num);
  printf("\nFactorial of %d is: %d",num,f);

  getch();
}

int fact(int n){
   if(n==1)
       return 1;
   else
       return(n*fact(n-1));
 }

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Intel Core i7-6700K "Skylake" CPU Review

Last month we finally got our first look at Intel's latest 14nm technology for desktop computers when we reviewed the Core i7-5775C, codenamed Broadwell. Intel's transition to the 14nm node was difficult and as a result Broadwell processors were delayed to the point where they practically don't exist in the retail market.

Even as I write this it's extremely difficult to purchase the Core i7-5775C, which is all the more surprising given what I am writing about: today marks the real arrival of Intel's 14nm desktop processors and they aren't codenamed Broadwell, but rather Skylake.

Whereas Broadwell was a 'tick' in Intel's "tick-tock" manufacturing and design model, offering a die shrink along a few minor tweaks, Skylake is a 'tock' which means the redesign should provide greater CPU and GPU performance with reduced power consumption, while remaining on the same 14nm manufacturing process as Broadwell.

Notably, the usual "tick-tock" cycle will be broken in 2016 with a third 14nm part known as Kaby Lake. Intel says its transition to 10nm chips will now come later than expected, pushed back to the second half of 2017 when a new architecture codenamed Cannonlake will arrive.

As we understand it, this is a hard launch and Skylake processors should be available immediately, at least the chips being announced anyway. However, rumor has it that supplies will only last for a few days, running dry before the end of launch week. Again, the lack of supply likely comes down to issues with the 14nm process and it isn't uncommon new CPUs and GPUs to be plagued by such problems.

A number of significant changes will be introduced with Skylake, chief among them being the introduction of the new LGA1151 socket, which isn't backward compatible with anything previously available, as I'm sure you've already guessed.

So unlike Broadwell, those with a 9-series motherboard won't simply be able to upgrade to Skylake, instead requiring a new motherboard that supports an Intel 100 Series chipset, also known as Sunrise Point.

The memory controller found on the Skylake processors has been upgraded to support DDR4 memory, much like Haswell-E, though support will be limited to dual-channel operation rather than quad.

Unlike Haswell-E, it appears Skylake processors support DDR3 memory as well, so it will be up to the motherboard manufacturers to decide which memory standard they are going to use and we'll likely see a multitude of DDR3 and DDR4 boards. It'll be interesting to see if there are any boards that support both DDR3 and DDR4 DIMMs, like what we saw back in the Core 2 days with boards offering both DDR2 and DDR3.

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