Program will not generate random numbers

[elcrapo]

I am having troubles getting this program to generate random numbers. Right now i have it set up to only generate 1 and 19. I do not know how to generate random numbers. :confused::?::twisted::eek:

thank you if anyone can help my dumbass.

// Exercise 12.16: MultiplicationTeacher.cpp
// This game asks the user to enter the product of two
// randomly generated numbers in the range 0-9.
#include <iostream> // required to perform C++ stream I/O
#include <ctime>    // contains prototype for function time

// contains function prototypes for functions srand and rand
#include <cstdlib>

using namespace std; // for accessing C++ Standard Library members

// function prototypes
int generateQuestion();
void generateOutput();

// function main begins program execution
int main()
{
   // randomize random number generator using current time
   srand( time( 0 ) ); 

   // define variables
   //int userAnswer = 0; // stores the user's answer
   int correctAnswer;  // stores the correct answer
   int a;
   int lowest=1, highest=19;
   int range=(highest-lowest)+1;
   int input;
   int times = lowest * highest;

   for(int index=0; index<1; index++){

   a = lowest+int(range*rand()/(RAND_MAX + 1.0));

   cout << "How much is" << lowest <<""<< "times" <<""<< highest << "(-1 to end)?" << endl;
   cin >> input;

   while(input = times)
   cout << "How much is" << lowest <<""<< "times" <<""<< highest << "(-1 to end)?" << endl;
   cin >> input;
   }

   return 0; // indicates successful termination

[WaltP]

I am having troubles getting this program to generate random numbers. Right now i have it set up to only generate 1 and 19. I do not know how to generate random numbers.

thank you if anyone can help my dumbass.

change a = lowest+int(range*rand()/(RAND_MAX + 1.0)); to a = (rand() % highest) + lowest;
This takes the random value, divides it byhighest and keeps the remainder (0-18) then adds 1 (0-19)

Now you're a smartass :mrgreen:

[dwks]

Really? . . . http://eternallyconfuzzled.com/arts/jsw_art_rand.aspx

Either way works, and some would recommend the OP's way over yours (myself included).

If you want it to generate numbers outside of 1-19 or something, change these variables.

int lowest=1, highest=19;

What exactly do you want?

[WaltP]

Really? . . . http://eternallyconfuzzled.com/arts/jsw_art_rand.aspx

Either way works, and some would recommend the OP's way over yours (myself included).

Thanks for the link. Interesting.... I'm convinced

I also noticed an error in my solution. So go ahead and use your original equation. :o