Differences

This shows you the differences between two versions of the page.

--- cpp:basic_data_types [2019/04/12 08:37]
gthanos [Αυτόματη εξαγωγή τύπου δεδομένων]
+++ cpp:basic_data_types [2021/04/25 14:39]
gthanos [Αυτόματη εξαγωγή τύπου δεδομένων]
@@ Line 50: / Line 50: @@
   int b(3);              // initial value: 3
   int c{2};              // initial value: 2
-  int result;            // initial value undetermined
   a = a + b;
-  result = a - c;
+  cout << "a: " << a << endl;  // endl stands for newline
-  cout << result;
+  b = a - c;
+  cout << "b: " << b << endl;
   return 0;
@@ Line 73: / Line 74: @@
   long b(3);              // initial value: 3  sizeof long
-  auto result = a + b;    // compiler automatically extracts the result's type.
+  auto result = a + b;    // compiler automatically extracts the variable type.
-  cout << result << endl;
+  cout << "sizeof(result): " << sizeof(result);
+  cout << "sizeof(int): " << sizeof(int);
+  cout << "sizeof(long): " << sizeof(long);
   return 0;
@@ Line 92: / Line 96: @@
   decltype(b) result;
-  result = a + b;
+  cout << "sizeof(result): " << sizeof(result);
-  cout << result << endl;
+  cout << "sizeof(int): " << sizeof(int);
+  cout << "sizeof(long): " << sizeof(long);
   return 0;

Αντικειμενοστραφής Προγραμματισμός