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cpp:basic_data_types [2019/04/12 08:37] – [Αυτόματη εξαγωγή τύπου δεδομένων] gthanoscpp:basic_data_types [2021/04/25 15:02] – [Αυτόματη εξαγωγή τύπου δεδομένων] gthanos
Line 50: Line 50:
   int b(3);              // initial value: 3   int b(3);              // initial value: 3
   int c{2};              // initial value: 2   int c{2};              // initial value: 2
-  int result;            // initial value undetermined+
  
   a = a + b;   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;   return 0;
Line 73: Line 74:
   long b(3);              // initial value: 3  sizeof long   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) << endl; 
 +  cout << "sizeof(int): " << sizeof(int) << endl; 
 +  cout << "sizeof(long): " << sizeof(long) << endl;
  
   return 0;   return 0;
Line 92: Line 96:
   decltype(b) result;   decltype(b) result;
  
-  result = a + b; +  cout << "sizeof(result): " << sizeof(result) << endl; 
-  cout << result << endl;+  cout << "sizeof(int): " << sizeof(int) << endl; 
 +  cout << "sizeof(long): " << sizeof(long) << endl;
      
   return 0;   return 0;
cpp/basic_data_types.txt · Last modified: 2021/04/25 14:02 (external edit)