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[C++/en] Tuple , updated

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This commit is contained in:
Jaskamal Kainth 2016-01-28 17:15:44 +05:30
parent c805148618
commit 4a1a6857ce
1 changed files with 5 additions and 5 deletions
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@ -967,10 +967,10 @@ v.swap(vector<Foo>());
// We start with constructing a tuple.
// Packing values into tuple
auto first = make_tuple( 10 , 'A' ) ;
auto first = make_tuple(10,'A') ;
const int maxN = 1e9;
const int maxL = 15;
auto second = make_tuple( maxN , maxL ) ;
auto second = make_tuple(maxN,maxL) ;
// printing elements of 'first' tuple
cout << get<0>(first) << " " << get<1>(first) << "\n"; //prints : 10 A
@ -983,12 +983,12 @@ cout << get<0>(second) << " " << get<1>(second) << "\n"; // prints: 1000000000 1
int first_int;
char first_char;
tie(first_int , first_char ) = first;
tie(first_int,first_char) = first;
cout << first_int << " " << first_char << "\n"; // prints : 10 A
// We can also create tuple like this.
tuple<int , char , double> third ( 11 ,'A' , 3.14141);
tuple<int,char,double> third (11,'A',3.14141);
// tuple_size returns number of elements in a tuple (as a constexpr)
cout << tuple_size < decltype(third) >::value << "\n"; // prints: 3
@ -996,7 +996,7 @@ cout << tuple_size < decltype(third) >::value << "\n"; // prints: 3
// tuple_cat concatenates the elements of all the tuples in the same order.
auto concatenated_tuple = tuple_cat( first, second ,third);
// concatenated_tuple becomes = (10 , 'A' , 1e9 , 15 , 11 , 'A' , 3.14141 )
// concatenated_tuple becomes = (10,'A',1e9,15,11,'A',3.14141)
cout << get<0>(concatenated_tuple) << "\n"; // prints: 10
cout << get<3>(concatenated_tuple) << "\n"; // prints: 15