# C/C++实现

Helper.h

``````#include <ctime>
#include <cmath>
#include <cstdlib>
#include <cassert>
#include <cstdio>

int* generateRandomArray(int number, int rangeLeft, int rangeRight);``````

Helper.cpp

``````#include "Helper.h"

int * generateRandomArray(int number, int rangeLeft, int rangeRight) {
// 使用完成后应该使用delete[] xxx删除空间
// 确保rangeLeft小于rangeRight
assert(rangeLeft < rangeRight);
int *arr = new int[number];
srand(time(NULL));
for (int i = 0; i < number; i++) {
// 生成随机数
// rand()函数生成0到最大整数的随机数
arr[i] = rand() % (rangeRight - rangeLeft + 1) + rangeLeft;
}
return arr;
}``````

main.cpp

``````#include "Helper.h"
int main() {
int* arr = generateRandomArray(10, 8, 12);
delete[] arr;
}
``````

# Java实现

Helper.java

``````import java.util.Random;

public class Helper {
public static int[] generateRandomArray(int number, int rangeLeft, int rangeRight) {
int[] arr = new int[number];
Random random = new Random();
for (int i = 0; i < number; i++) {
arr[i] = (random.nextInt(Integer.MAX_VALUE)) % (rangeRight - rangeLeft + 1) + rangeLeft;
}
return arr;
}
}``````

TestHelper.java

``````public class TestHelper {

public static void main(String[] args) {
int[] arr = Helper.generateRandomArray(10, 10, 20);
for (int i = 0; i < 10; i++) {
System.out.println(arr[i]);
}
}
}``````