Tuples v C ++
Tuple je predmet, ki lahko vsebuje številne elemente. Elementi so lahko različnih vrst podatkov. Elementi tupov se inicializirajo kot argumenti v vrstnem redu, v katerih bodo dostopni. Tuples so vsestranska struktura podatkov za razvrščanje vrednosti. Razumeti, kako uporabljati Tuples v C ++ in njihovih aplikacijah C ++ tečaj ponuja celovite vaje in primere.
Operacije na Tupleju
1. get (): get () se uporablja za dostop do vrednosti nagiba in jih spreminja, sprejema ime indeksa in tuple kot argumente za dostop do določenega elementa.
2. make_tuple (): make_tuple () se uporablja za dodelitev tupleja z vrednostmi. Prenesene vrednosti bi morale biti v vrstnem redu z vrednostmi, ki so razglašene v nagibu.
CPP #include #include using namespace std ; int main () { // Declaring tuple tuple < char int float > geek ; // Assigning values to tuple using make_tuple() geek = make_tuple ( 'a' 10 15.5 ); // Printing initial tuple values using get() cout < < 'The initial values of tuple are: ' ; cout < < get < 0 > ( geek ) < < ' ' < < get < 1 > ( geek ); cout < < ' ' < < get < 2 > ( geek ) < < endl ; // Use of get() to change values of tuple get < 0 > ( geek ) = 'b' ; get < 2 > ( geek ) = 20.5 ; // Printing modified tuple values cout < < 'The modified values of tuple are: ' ; cout < < get < 0 > ( geek ) < < ' ' < < get < 1 > ( geek ); cout < < ' ' < < get < 2 > ( geek ) < < endl ; return 0 ; }
Izhod
The initial values of tuple are: a 10 15.5 The modified values of tuple are: b 10 20.5
Pojasnilo : V zgornji kodi get () spremeni 1. in 3. vrednost vrednosti Tuple.
3. Tuple_size: Vrne število elementov, ki so prisotni v Tupleju.
CPP #include #include using namespace std ; int main () { // Initializing tuple tuple < char int float > geek ( 20 'g' 17.5 ); // Use of size to find tuple_size of tuple cout < < 'The size of tuple is: ' ; cout < < tuple_size < decltype ( geek ) >:: value ; return 0 ; }
Izhod
The size of tuple is: 3
4. SWAP (): SWAP () zamenja elemente dveh različnih nabojev.
CPP #include #include using namespace std ; int main () { // Initializing 1st tuple tuple < int char float > tup1 ( 20 'g' 17.5 ); // Initializing 2nd tuple tuple < int char float > tup2 ( 10 'f' 15.5 ); // Printing 1st and 2nd tuple before swapping cout < < 'The first tuple elements before swapping are: ' ; cout < < get < 0 > ( tup1 ) < < ' ' < < get < 1 > ( tup1 ) < < ' ' < < get < 2 > ( tup1 ) < < endl ; cout < < 'The second tuple elements before swapping are: ' ; cout < < get < 0 > ( tup2 ) < < ' ' < < get < 1 > ( tup2 ) < < ' ' < < get < 2 > ( tup2 ) < < endl ; // Swapping tup1 values with tup2 tup1 . swap ( tup2 ); // Printing 1st and 2nd tuple after swapping cout < < 'The first tuple elements after swapping are: ' ; cout < < get < 0 > ( tup1 ) < < ' ' < < get < 1 > ( tup1 ) < < ' ' < < get < 2 > ( tup1 ) < < endl ; cout < < 'The second tuple elements after swapping are: ' ; cout < < get < 0 > ( tup2 ) < < ' ' < < get < 1 > ( tup2 ) < < ' ' < < get < 2 > ( tup2 ) < < endl ; return 0 ; }
Izhod
The first tuple elements before swapping are: 20 g 17.5
The second tuple elements before swapping are: 10 f 15.5
The first tuple elements after swapping are: 10 f 15.5
The second tuple elements after swapping are: 20 g 17.55. kravata () : Delo kravate () je, da razpakirate vrednosti nagiba v ločene spremenljivke. Obstajata dve različici kravate () z in brez 'ignoriranja' 'ignoriranja' prezre določen nagibani element in ga prepreči, da bi se razpakirala.
CPP#include // for tie() and tuple using namespace std ; int main () { // Initializing variables for unpacking int i_val ; char ch_val ; float f_val ; // Initializing tuple tuple < int char float > tup1 ( 20 'g' 17.5 ); // Use of tie() without ignore tie ( i_val ch_val f_val ) = tup1 ; // Displaying unpacked tuple elements without ignore cout < < 'The unpacked tuple values (without ignore) are: ' ; cout < < i_val < < ' ' < < ch_val < < ' ' < < f_val ; cout < < endl ; // Use of tie() with ignore // ignores char value tie ( i_val ignore f_val ) = tup1 ; // Displaying unpacked tuple elements with ignore cout < < 'The unpacked tuple values (with ignore) are: ' ; cout < < i_val < < ' ' < < f_val ; cout < < endl ; return 0 ; }
IzhodThe unpacked tuple values (without ignore) are: 20 g 17.5 The unpacked tuple values (with ignore) are: 20 17.56. tuple_cat (): Ta funkcija združuje dva tula in vrne nov nabor.
CPP#include // for tuple_cat() and tuple using namespace std ; int main () { // Initializing 1st tuple tuple < int char float > tup1 ( 20 'g' 17.5 ); // Initializing 2nd tuple tuple < int char float > tup2 ( 30 'f' 10.5 ); // Concatenating 2 tuples to return a new tuple auto tup3 = tuple_cat ( tup1 tup2 ); // Displaying new tuple elements cout < < 'The new tuple elements in order are: ' ; cout < < get < 0 > ( tup3 ) < < ' ' < < get < 1 > ( tup3 ) < < ' ' < < get < 2 > ( tup3 ) < < ' ' < < get < 3 > ( tup3 ) < < ' ' < < get < 4 > ( tup3 ) < < ' ' < < get < 5 > ( tup3 ) < < endl ; return 0 ; }
IzhodThe new tuple elements in order are: 20 g 17.5 30 f 10.5
