Описание тега srand

A random seed is used to determine the initial state of a pseudo-random number generator. Such generators are used in many programming languages.

For a specific generator and a single value of seed the sequence of generated numbers will be the same.

Sample code:

#include <cstdlib>

int seed = 111;
int arr1[10];
int arr2[10];
srand (seed);
for (int a=0; a<10; a++) {
  arr1[a] = rand();
}
srand (seed);
for (int a=0; a<10; a++) {
  arr2[a] = rand();
}
for (int a=0; a<10; a++) {
  assert arr1[a] == arr2[a];
}