how to shuffle array in c
#include <stdlib.h> /* Arrange the N elements of ARRAY in random order. Only effective if N is much smaller than RAND_MAX; if this may not be the case, use a better random number generator. */ void shuffle(int *array, size_t n) { if (n > 1) { size_t i; for (i = 0; i < n - 1; i++) { size_t j = i + rand() / (RAND_MAX / (n - i) + 1); int t = array[j]; array[j] = array[i]; array[i] = t; } } }
