в 14:21, 25 мая 2010

2010-05-25T14:21:17Z

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2010-05-25T10:29:37Z

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==make a list from a list with list_copy()==

<source lang="cpp">#include <iomanip>
#include <iostream>
#include <list>
#include <vector>
using namespace std;
template <class T>
void print(T& c){
for( typename T::iterator i = c.begin(); i != c.end(); i++ ){
std::cout << *i << endl;
}
}
int main( )
{
const int data[] = { 1, 1, 2, 3, 5 };
list<int> original( data,data + sizeof( data ) / sizeof( data[0] ) );
// make a list from a list
list<int> list_copy( original );

// show results
print( original);
print( list_copy);
}</source>

==make a list of floats from a list of ints==

<source lang="cpp">#include <iomanip>
#include <iostream>
#include <list>
#include <vector>
using namespace std;
template <class T>
void print(T& c){
for( typename T::iterator i = c.begin(); i != c.end(); i++ ){
std::cout << *i << endl;
}
}
int main( )
{
const int data[] = { 1, 1, 2, 3, 5 };
list<int> original( data,data + sizeof( data ) / sizeof( data[0] ) );
// make a list of floats from a list of ints
list<float> list_float( original.begin(), original.end() );
// show results
print( original);
print( list_float );
}</source>

==populate a new list with the elements of list2==

<source lang="cpp">#include <list>
#include <string>
#include <iostream>
using namespace std;
int main()
{
list<int> list1;
size_t n = 10;
double val = 3.14;
list<double> list2(n, val);
list<double> list3(list2);
cout << "Size of list1 " << list1.size() << endl;
cout << "Size of list2 " << list2.size() << endl;
cout << "Size of list3 " << list3.size() << endl;
// populate a new list with the elements of list2
list<double> list4;
list<double>::const_iterator i;
for (i = list2.begin(); i != list2.end(); ++i)
{
list4.push_back(*i);
}
// Print every character in the list
for (i = list4.begin(); i != list4.end(); ++i)
{
cout << *i << ",";
}
cout << endl;
return 0;
}</source>

==Use list.assign to replace contents of a list with elements of another list==

<source lang="cpp">#include <iostream>
using std::cout;
using std::endl;
#include <list> // list class-template definition
#include <algorithm> // copy algorithm
#include <iterator> // ostream_iterator
int main()
{
int array[ 4 ] = { 2, 6, 4, 8 };
std::list< int > values; // create list of ints
std::list< int > otherValues; // create list of ints
std::ostream_iterator< int > output( cout, " " );
// insert items in values
values.push_front( 1 );
values.push_front( 3 );
values.push_back( 4 );
values.push_back( 2 );
cout << "values contains: ";
std::copy( values.begin(), values.end(), output );
otherValues.insert( otherValues.begin(), array, array + 4 );
cout << "\n\notherValues contains: ";
std::copy( otherValues.begin(), otherValues.end(), output );

values.assign( otherValues.begin(), otherValues.end() );
cout << "\n\nvalues contains: ";
std::copy( values.begin(), values.end(), output );
cout << endl;
return 0;
}</source>
<pre class=codeResult>values contains: 3 1 4 2
otherValues contains: 2 6 4 8
values contains: 2 6 4 8</pre>

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C++ Tutorial/list/list assign - История изменений

в 14:21, 25 мая 2010

Admin: 1 версия: Импорт контента...