createRandPin函数执行时，code数组被篡改，这是怎么回事？

Question

#include <iostream>
#include<cstdlib>
#include<ctime>
#define N 10
using namespace std;
void randNumArray(int *num);
void printNumArray(int *num);
void isRight(char* pin, char* code);
void createRandPin(int *num,char *pin, int code[]);
void scanCode(char *randCode);
int main()
{
     int code[] = { 1,2,3,4,5 };
    int num[5];
    char pin[5];
    char randCode[5];

    randNumArray(num);
    printNumArray(num);
    createRandPin(num, pin, code);
    scanCode(randCode);
    isRight(pin,randCode);
}

void randNumArray(int* num)
{
    tm *ptr;
    time_t it;
    it = time(NULL);
    srand(it);
    for (int i = 0; i < N; i++)
    {
        num[i] = rand() % 3+1;
    }
}

void printNumArray(int* num)
{
    for (int i = 0; i < N; i++)
        cout << num[i]<< " ";
    cout << endl;
}
void createRandPin(int* num, char* pin, int code[])
{
    for (int i = 0; i < 5; i++)
    {
        cout << code[i];
        int k = code[i];
        pin[i] =num[k];
    }
}
void scanCode(char * randCode)
{
    cout << "请输入密码：";
    for (int i = 0; i < 5; i++)
        cin >> randCode[i];
}
void isRight(char *pin,  char* randCode)
{
    if (strcmp(pin, randCode) == 0)
    {
        cout << "密码正确\n";
    }
    else
        cout << "密码错误\n";
}

当i=0的时候，code[i]=2,应该code[0]=1才对，代码运行期间没有对code数组进行操作。。。

Answer 1

https://blog.csdn.net/qq_41694204/article/details/81699975