定义两个整型指针，分别用malloc、calloc对其分配空间保存3个元素，malloc分配的空间用memset清零，随机对数组进行赋值随机范围1-3，赋值后用memcmp比较两个数组。如果相同打印G

    int *p1 =NULL;
    int *p2 =NULL;
    p1 =malloc(12);//给p1动态分配内存
    for (int i = 0; i < 3; i++) {
     *(p1 +i) = arc4random() % (3-1 +1) +1;
        printf("%d ",*(p1 +i));
          }
    printf("\n");
     p2 =calloc(3,4);//给p2动态分配内存
    for (int i = 0; i < 3; i++) {
        *(p2 + i) = arc4random()% (3 -1 +1) + 1;
        printf("%d ",*(p2 + i));
        

    }
  
        if (memcmp(p2, p1,12) == 0) {
            printf("\nGood!");
        }else{
            printf("\nFailed");
        }

<pre name="code" class="cpp">    memset(p1, 0, 0);//对p1中清零

free(p1); p1 =NULL; free(p2); p2 = NULL;