Variable Number of Arguments in C Language

This Video explains about Variable Number of Arguments in C Programming,

Agenda of this Video:
Variable Number of Arguments
step by step methodologies in C

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[yes_cassi]

but this returns the sum not the average as the functions describes :D

[eddiemaune]

The second parameter of va_start is not the number of elements, it is the name of the last parameter before the argument list.

[TravellerMann]

nice explanation..keep doing this work..

[mrinalaich]

Human or Robot couldn't figure out who was talking...
Secondly, very informal and casual way of teaching.... Can't use word like 'Next what?'

[bahaakrayem]

That's sum
If you need average :
return sum/cnt;

[jovanasimic]

Thank you so much and greetings from Serbia

[jonjoni]

umm... The function calculates the sum and returns it. This isn't the average at all!
Besides that it was very helpful.

[yashshukla]

sir, can you please give us that document from which you were teaching?? please
sir if you do so that will be very helpful

[ertugrulsaka]

if you looking better example; variable names are turkish, meaning, topla = sum, sayi1, 2, 3 = number1, 2, 3, ortalama = average.
#include "stdafx.h"
#include <iostream>
#include <stdarg.h>
using namespace std;

int topla(int parametreSayisi, ...);
double ortalamaBul(int parametreSayisi, ...);
int _tmain(int argc, _TCHAR* argv[])
{

int sayi1 = 5, sayi2 = 10, sayi3 = 15;
cout << sayi1 << endl << sayi2 << endl << sayi3 << endl;
cout << topla(2, sayi1, sayi2) << endl;
cout << topla(3, sayi1, sayi2, sayi3) << endl;
cout << topla(3, 10, 20, 30) << endl;

cout << ortalamaBul(2, sayi1, sayi2) << endl;
cout << ortalamaBul(3, sayi1, sayi2, sayi3) << endl;
cout << ortalamaBul(3, 10, 20, 30) << endl;

system("pause");
return 0;
}

int topla(int parametreSayisi, ...)
{
va_list parametrePtr;
va_start(parametrePtr, parametreSayisi);

int toplam = 0;
for (size_t i = 0; i < parametreSayisi; i++)
{
toplam += va_arg(parametrePtr, int);
}
va_end(parametrePtr);
return toplam;
}

double ortalamaBul(int parametreSayisi, ...)
{
va_list parametrePtr;
va_start(parametrePtr, parametreSayisi);
int toplam = 0;
for (size_t i = 0; i < parametreSayisi; i++)
{
toplam += va_arg(parametrePtr, int);
}
va_end(parametrePtr);
return (double)toplam / parametreSayisi;
}

[princevijaypratap]

Can we pass different data types suppose double alongwith int as aarguments ?if yes how can we do that?

[meghanathreddy]

what if str data type present in those variable arguments

[aminamer]

what happens if i don't pass any argument (int) to the methode average ?

[praneeth]

Sir, please make a tutorial on 'Data Structures through C'...

[erivalo]

Nice tuto, but it would be better if function Average returns an "average" value...

[praveenmhapsekar]

Great explanation!!! Thanks

Minor comments:
Function should return average instead of sum.
Variable n is redundant, Variable Sum can be used instead.