C++ Tutorial/deque/deque size — различия между версиями
Admin (обсуждение | вклад) м (1 версия: Импорт контента...) |
Admin (обсуждение | вклад) м (1 версия: Импорт контента...) |
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Текущая версия на 10:29, 25 мая 2010
deque.push_back( value )
#include <iostream>
using std::cout;
using std::endl;
#include <deque> // deque class-template definition
#include <algorithm> // copy algorithm
#include <iterator> // ostream_iterator
int main()
{
std::deque< double > values; // create deque of doubles
std::ostream_iterator< double > output( cout, " " );
values.push_front( 2.2 );
values.push_front( 3.5 );
values.push_back( 1.1 );
cout << "values contains: ";
// use subscript operator to obtain elements of values
for ( int i = 0; i < values.size(); i++ )
cout << values[ i ] << " ";
cout << endl;
return 0;
}values contains: 3.5 2.2 1.1
Resize a deque
#include <deque>
#include <iostream>
using namespace std;
typedef deque<char > CHARDEQUE;
void print_contents (CHARDEQUE deque, char*);
int main(void){
CHARDEQUE a;
a.push_back("A");
a.push_back("B");
a.push_back("C");
a.push_back("D");
print_contents (a,"a");
cout << "max_size of a is " << a.max_size() << endl;
cout << "size of a is " << a.size() << endl;
a.resize(10,"X");
print_contents (a,"a");
cout << "size of a is " << a.size() << endl;
a.resize(5); // resize it to 5
print_contents (a,"a");
cout << "size of a is " <<a.size() << endl;
cout << "max_size of a is still " << a.max_size() << endl;
}
void print_contents (CHARDEQUE deque, char *name){
CHARDEQUE::iterator pdeque;
cout <<"The contents of "<< name <<" : ";
for(pdeque = deque.begin();pdeque != deque.end();pdeque++){
cout << *pdeque <<" ";
}
cout<< endl;
}