Return a random integer between MIN and MAX

example.cpp

#include <iostream>

#include "Randint.h"

int main()
{
    Randint randint;
    std::cout << randint(1, 10) << std::endl; /** displays a number between 1 and 10 **/
    
    randint.setMinMax(5, 12);
    std::cout << randint() << std::endl; /** displays a number between 5 and 12 **/
    
    Randint randinteger(-4, 19);
    std::cout << randinteger() << std::endl; /** displays a number between -4 and 19 **/
    
    randinteger.setMinMax(randinteger.getMin()+1, randinteger.getMax()+1);
    std::cout << randinteger() << std::endl; /** displays a number between -3 and 20 **/
    
    randinteger.setMinMax(20, 10);
    std::cout << randinteger() << std::endl; /** displays a number between 10 and 20 **/
    
    std::cout << Randint(12, 35) << std::endl; /** displays a number between 12 and 35 **/
    
    return 0;
}

#endif

Randint.cpp

#include "Randint.h"

Randint::Randint()
{
    srand(time(0));
    m_MIN = 1;
    m_MAX = 10;
}

Randint::Randint(int min, int max)
{
	srand(time(0));
    if(max > min)
    {
        m_MIN = min;
        m_MAX = max;
    }
    else
    {
        m_MIN = max;
        m_MAX = min;
    }    
}

Randint::~Randint()
{
    /** void **/
}

void Randint::setMinMax(int min, int max)
{
    if(max > min)
    {
        m_MIN = min;
        m_MAX = max;
    }
    else
    {
    	m_MIN = max;
    	m_MAX = min;
    }
}

int Randint::getMin()
{
    return m_MIN;
}

int Randint::getMax()
{
    return m_MAX;
}

int Randint::operator()()
{
	return rand()%(m_MAX-m_MIN+1) + m_MIN;
}

int Randint::operator()(int min, int max)
{
    if(max > min)
    {
        return rand()%(max-min+1) + min;
    }
    else
    {
        return rand()%(min-max+1) + max;
    }
}

Randint.h

#ifndef RANDINT_H_INCLUDED
#define RANDINT_H_INCLUDED

#include <cstdlib>
#include <ctime>

class Randint
{
    public:
        Randint();
        Randint(int, int);
        ~Randint();
        void setMinMax(int, int);
        int getMin();
        int getMax();
        int operator()();
        int operator()(int, int);
        
    private:
        int m_MIN;
        int m_MAX;
};

It could be very useful so don't forget to use it !