c++中输出字符数组名字，输出的不是其地址，而是乱码，和字母

Question

#include<iostream>
using namespace std;
#include<cstdlib>
#include<cstdio>

int main()
{
    char  a[] = { 'j','5','k'};
    int b[] = { 1,2,30 };
    cout << a << endl; 
    cout << b << endl;

    int c;
    cin >> c;
    return 0;
//结果是这样，不理解，希望有大佬能解释一下，万分感谢
  
}

Answer 1

因为字符数组没加\0作为结束标志，所以后面有问号，输出b是数组的地址
改之后

#include<iostream>
using namespace std;
#include<cstdlib>
#include<cstdio>
 
int main()
{
    char  a[] = { 'j','5','k','\0'};
    int b[] = { 1,2,30 };
    cout << a << endl; 
    for (int i=0;i<3;i++)
    cout << b[i] <<" ";
 
    int c;
    cin >> c;
    return 0;
  
}