C++ template overload

may be you are right
may be you are right
9 7 6 5 4 3 2 1 10 66
9 7 6 5 4 3 2 1 10 66
Program ended with exit code: 0

#include <iostream>

using namespace std;

template <typename T>
void show(T a, size_t);

template <typename T>
void show(T a);

int main() {
int a[] = {9, 7, 6, 5, 4, 3, 2, 1, 10,66};
int b[sizeof(a) / sizeof(int)] = {};  // 建立同数组a相同大小的数组b并将其所有元素初始化为0

char aa[] = "may be you are right";
char bb[strlen(aa) + 1]; // 多分配一个字节存储截止符'\0'

memcpy(bb, aa, strlen(aa) + 1);
memcpy(b, a, sizeof(a));  // 因为memcpy是逐字节拷贝，而数组b为int类型，拷贝的长度应为sizeof(a)

show(a, sizeof(a) / sizeof(int));
show(b, sizeof(b) / sizeof(int));
show(aa);
show(bb);

return 0;
}

template<typename T>
void show(T a, size_t len) {
for (int i = 0; i < len; i++)
cout << a[i] << ' ';
cout << endl;
}

template<typename T>
void show(T a) {
while ((*a) != '\0')
cout << *a++;
cout << endl;
}