-> practice on templates

Author: aryanjain28

practice10.cpp

@@ -1,18 +1,34 @@
 #include <iostream>
+#include <string>
 
 using namespace std;
 
-void preview(int *arr /*arr[]: Also valid */, int size)
+template <typename T, typename S, size_t n>
+void preview(T (&arr)[n], S name)
 {
-    for (int i = 0; i < size; i++)
+    int length = sizeof(arr) / sizeof(T);
+
+    cout << endl;
+    cout << "sizeof(arr) : " << sizeof(arr) << endl;
+    cout << "sizeof(T) : " << sizeof(T) << endl;
+    cout << "LEN: " << length << endl;
+
+    for (int i = 0; i < length; i++)
     {
-        cout << "*(arr + i): " << *(arr + i) << endl;
+        cout << "*(arr + i): " << *(arr + i)
+             << " | "
+             << "arr[" << i << "]: " << arr[i]
+             << " " << name << endl;
     }
 }
 
 int main()
 {
-    int arr[] = {1, 2, 3, 4, 5};
-    preview(arr, sizeof(arr) / sizeof(arr[0]));
+    int arr_i[] = {1, 2, 3, 4, 5};
+    char arr_c[] = {'A', 'R', 'Y', 'A', 'N'};
+
+    preview(arr_c, "name1");
+    preview(arr_i, "name22");
+
     return 1;
 }