vs运行C语言编程有错误

问题遇到的现象和发生背景

#include
#include
#include

int main(void)
{
int years = 2003, mouth = 05;
//display member 1
printf("member 1: ");

//display the years,mouth and code
//the years can't bigger than 2022
if (years < 2023)
{
    printf("%d", years);
}
else
{
    printf("this is wrong");
}
//the mouth can't bigger than 13
if (mouth<13)
{
    printf("%d", mouth);
}
else
{
    printf("this is wrong");
}
// make a random 4 digit number
srand(time(NULL));
int r = rand(4);
printf("%d",r);
printf("\n");

//display member 2
char firstname = "Lux", middlename = "AA", lastname = "RR";
printf("member 2:\n");
printf("–first member is %s \n", &firstname);
printf("–middle member is %s \n", &middlename);
printf("–last member is %s \n", &lastname);


return 0;

}

我设置月是05但不能识别到0
还有就是char不能正常运行

我想要达到的结果

年月随机4个数字
– first member is ”Lux”
– second member is ”AA”
– third member is ”RR“

烫烫烫，😂典型的指针越界

前面判断条件加一个year>0，月也一样