Same random numbers every time I run the program

Question

My random numbers that output, output in the same sequence every time I run my game. Why is this happening?

I have

#include <cstdlib>  

and am using this to generate the random numbers

randomDiceRollComputer = 1 + rand() % 6; 

Answer 1

You need to seed your random number generator:

Try putting this at the beginning of the program:

srand ( time(NULL) ); 

Note that you will need to #include <ctime>.

The idea here is to seed the RNG with a different number each time you launch the program. By using time as the seed, you get a different number each time you launch the program.

Answer 2

You need to give the randum number generator a seed. This can be done by taking the current time, as this is hopefully some kind of random.

#include <cstdlib> #include <ctime> using namespace std;  int main() {     int  r;     srand(time(0));     r = rand();     return 0; }