Question

In c++, modify this program so that you allow the user to enter the min and maximum values (In this case they cannot be defined as constants, why?).

// This program demonstrates random numbers.
#include <iostream>
#include <cstdlib>   // rand and srand
#include <ctime>     // For the time function
using namespace std;

int main()
{
   // Get the system time.
   unsigned seed = time(0);
   
   // Seed the random number generator.
   srand(seed);
   
   // Display three random numbers.
   cout << rand() << endl;
   cout << rand() << endl;
   cout << rand() << endl;
   return 0;
}

Answer 1

C++ program that prompts user minimum and maximum value from user keyword. Then , print the three random numbers in a range of minimum and maximum values.

//main.cpp
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
//start of main function
int main()
{
// Get the system time.
unsigned seed = time(0);
//declare variables of integer type
int minimum;
int maximum;
// Seed the random number generator.
srand(seed);

cout<<"Enter minimum value :";
//read minimum value
cin>>minimum;
cout<<"Enter maximum value :";
//read maximum value
cin>>maximum;

// Display three random numbers.
cout<<"Random numbers"<<endl;
cout << rand()%(maximum-minimum)+minimum << endl;
cout << rand()%(maximum-minimum)+minimum << endl;
cout << rand()%(maximum-minimum)+minimum<< endl;

//pause program output console
system("pause");
return 0;

}//end of main function

Sample output screenshot: