A set of simple programs written in C + + programming language

1-This program will analyze the number of primary factors:

#include <iostream.h>

#include <conio.h>

void main ()

{

int j, n;

char ch;

do

{

cout << "Enter a numbers: ";

cin >> n;

for (j = 2 ; j <= n/2; j++)

if ( n % j == 0 )

cout << n << " divisible by: " << j << endl ;

cout << "again (y/n)?";

cin >> ch;

}

while (ch != n);

getch ();

}

2-Largest number among three numbers (the shortcut method):

#include <iostream.h>

#include <conio.h>

void main ()

{

float a , b , c , max ;

char ch;

do

{

cout << "\nEnter three numbers: \n" ;

cin >> a >> b >> c;

max = (a > b ) ? ((a > c) ? a:c ): ((b > c) ? b:c );

cout << max << " is the grater.\n" ;

cout << "\nagain (y/n)?";

cin >> ch;

}

while (ch != 'n');

getch ();

}

3-The way the program calculates the shortcut monthly net salary after tax it according toconditions:
2% will be deducted from the salary that is less than or equal to 1000
3% will be deducted from the salary that between the 1000 and the 2000:

#include <iostream.h>

#include <conio.h>

void main ()

{

float S, N;

L: cout << "\nEnter your salary: " ;

cin >> S;

N =(S <= 1000) ? S-S*.02:((S>=2000) ? S-S*.04 : S-S*.03);

cout << "Net salary after tax is: " << N << endl;

goto L;

getch ();

}