Random Function
Understand overloaded methods that generate random numbers of different types.
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Problem
Write a program that provides two overloaded random( ) functions. The first one generates an integer random number, whereas the second generates a random number that lies within the range passed to the random( ) function.
Coding solution
Here is a solution to the problem above.
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// Generation of random numbers using overloaded functions#include <iostream>int random ( int ) ;int random ( int, int ) ;int main( ){int i, n ;std::cout << "Random numbers between 1 to 100: \n";for ( i = 0 ; i <= 9 ; i++ ){n = random ( 100 ) ;std::cout << n << "\n" ;}std::cout << "Random numbers between 100 to 500: \n";for ( i = 0 ; i <= 9 ; i++ ){n = random ( 100, 500 ) ;std::cout << n << "\n" ;}}int random ( int max ){static int xn = time ( NULL ) % max ;static int cons = time ( NULL ) % 100 ;static int mult = time ( NULL ) % 120 ;int xnplus1, temp ;xnplus1 = ( mult * xn + cons ) % max ;temp = xnplus1 ;xn = xnplus1 ;return ( temp ) ;}int random ( int min, int max ){int range ;range = max - min ;static int xn = time ( NULL ) % range ;static int cons = time ( NULL ) % 100 ;static int mult = time ( NULL ) % 120 ;int xnplus1, temp ;xnplus1 = ( mult * xn + cons ) % max ;temp = min + xnplus1 ;xn = xnplus1 ;return ( temp ) ;}
Explanation
The program uses a Linear Congruential Generator (LCG) algorithm that yields a sequence of pseudo-random numbers calculated with a discontinuous piecewise linear equation. The generator is defined by the recurrence relation:
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