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Contents:


swap function:
Swapping two values to change their addresses.
a

max function:

The largest number among two.
a

absolute value function:

The positive value of a number.
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sorting function:

How to sort an array.
a

bisection function:

Bissection method used to solve equations by computing, example of cable strung ..
a

Newton-Raphson function:

To solve equations numerically, example of free fall motion ..
a

Secant function:

To solve equations numerically, example of free fall motion ..
a

isPrime function:

This function tests whether an integer is prime..
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abundant function:

This function tests whether an integer is abundant..
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factorial function:

Factorial of an integer..
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quadratic function:

solving a quadratic equation ..
a

even_odd function:

To know if an integer is even or odd ..
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mean value function:

To calculate the arithmetic mean of some values..
a

reverse function:

To reverse an integer and to know whether a string is palindrome..
a

least squares function :

To calculate the slope and the y_intercept of a linear equation ..
a

Monte Carlo method:

To calculate integrales or probabilities using Monte Carlo technique ..
a

2 and 3 equations systems solving :

To solve the 2 and 3 equations systems with 2 and 3 variables ..
a

Interpolation and Extrapolation :

To solve for lacking values in graphs or tables ..
a

Integer divisors :

Gives the divisors fo an integer and tests whether it is prime ..
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Amicable pair :

Gives, if it exists, the amicable number of a given integer ..
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Perfect numbers :

Tests whether a positive integer is perfect, and more ..
a

Periodic table of elements:

Periodic table of elements in C language, and more ..
a

Playing TicTacToe

Using some Fortran90 language funtionalities, and more ..
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   Divisors of an integer
Integer divisor function


	1. Definition

	The following function ouputs the divisors of an integer. Plus,
	It tests whether it is prime.

	2. Example in C language:
	
	#include <stdio.h>

	int main()
	{
	int number, rate;

	printf("n Enter an integer ?: --> ");
	scanf("%d", &number);
	//How many numbers will be written by line ?
	printf("n How many divisors would be displayed by line ?: --> ");
	scanf("%d", &rate);

	printf("n");
	printf("n The divisors of %d are:n", number);
	printf("n");

	int n , k = 0 ;
	for ( n = 1 ; n <= number ; n++ )
	if ( number% n == 0 )
	{
	k++ ;
	printf("%3d)%4d   ", k, n);
	if ( k % rate == 0 ) printf("n");
	}
	
	// Plus ..
	printf("nn The number %d has %d divisors. ", number, k);

	if ( k == 2 )
	{
		printf("It is prime. n");
	}
	else
	{
	printf("It is not prime. n");
	}
	printf("n");

	return 0;
	}
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