Swap variable value without using temporary variable

Q : Write a C program to swap the values of two variables without using the temporary variable?

Answer :

#include<stdio.h>

#include<conio.h>

/*##########################

     Girfa Student Help

     Swap two variable without

     temporary variable

  ##########################*/

Count divisible number in given range C Language

Q : Write a C Program to print and count all numbers between 1 to 100 divisible by 11.

Answer : 

#include<stdio.h>

#include<conio.h>

/*##########################

     Girfa Student Help

     Count & print all number 1 to 100

     divisible by 11

  ##########################*/

Actual and former parameter C Language

As we know C language is building block of function. Anything done in C language by function. Function can take argument. There are two types of argument given below.

• Argument pass while calling is actual
• Argument while declaring function is former

#include<stdio.h>

#include<conio.h>

/*##########################

     Girfa Student Help

     Formal and actual parameter program

  ##########################*/

int sum(int,int);

void main()

{

     int a,b,c;

     clrscr();

     a=10;

     b=20;

     c=sum(a,b);   /* a and b are actual parameter */

     printf("\n\tA=%d\n\tB=%d\n\tSum=%d",a,b,c);

     getch();

}

int sum(n1,n2) /* n1,n2 are formal parameter */

{

     return n1+n2;

}

In the function main in the example above, a, and b are all actual parameters when used to call calculate sum function. On the other hand, the corresponding variables in sum_funcation definition (namely n1, n2) are all formal parameters because they appear in a function definition.

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Difference between function definition and function declaration

Difference between  function definition and function declaration

DECLARATION	DEFINITION
A variable or a function can be declared any number of times	A variable or a function can be defined only once
Memory will not be allocated during declaration	Memory will be allocated
int f(int); The above is a function declaration. This declaration is just for informing the compiler that a function named f with return type and argument as int will be used in the function.	int f(int a) {   return a; } The system allocates memory by seeing the above function definition.

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