в 14:21, 25 мая 2010

2010-05-25T14:21:17Z

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2010-05-25T10:29:34Z

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==Accessing the Front and Back of a List with for loop==

<source lang="cpp">#include <algorithm>
#include <iostream>
#include <list>
using namespace std;
int main( )
{
const char* name_data[] = { "A", "B","C", "D", "E","F", "G" };
const bool girl_data[] = { true, true, false, false, true, true, true };
const int num_graduates = sizeof( girl_data ) / sizeof( girl_data[0] );
list< pair< string, bool > > graduate;
for( int i = 0; i < num_graduates; ++i )
if( girl_data[i] )
graduate.push_front(
make_pair( name_data[i], girl_data[i] ) );
else
graduate.push_back(
make_pair( name_data[i], girl_data[i] ) );
}</source>

==Accessing the Front and Back of a List with while loop==

<source lang="cpp">#include <algorithm>
#include <iostream>
#include <list>
using namespace std;
int main( )
{
const char* name_data[] = { "A", "B","C", "D", "E","F", "G" };
const bool girl_data[] = { true, true, false, false, true, true, true };
const int num_graduates = sizeof( girl_data ) / sizeof( girl_data[0] );
list< pair< string, bool > > graduate;
while( !graduate.empty() )
{
cout << graduate.front().first;
graduate.pop_front();
if( !graduate.empty() )
{
cout << " and " << graduate.back().first;
graduate.pop_back();
}
cout << endl;
}
}</source>

==end() is the pointer to the end of a list==

<source lang="cpp">#include <iostream>
#include <list>
using namespace std;

int main()
{
list<int> lst;
int i;

for(i=0; i<10; i++) lst.push_back(i);

cout << "List printed forwards:\n";
list<int>::iterator p = lst.begin();
while(p != lst.end()) {
cout << *p << endl;
p++;
}

cout << "List printed backwards:\n";
p = lst.end();
while(p != lst.begin()) {
p--;
cout << *p << " ";
}

return 0;
}</source>

==list.begin and list.end==

<source lang="cpp">#include <iostream>
#include <list>
using namespace std;
int main()
{
list<int> lst; // create an empty list
int i;
for(i=0; i<10; i++) lst.push_back(i);
cout << "List printed forwards:\n";
list<int>::iterator p = lst.begin();
while(p != lst.end()) {
cout << *p << " ";
p++;
}
cout << "\n\n";
cout << "List printed backwards:\n";
p = lst.end();
while(p != lst.begin()) {
p--; // decrement pointer before using
cout << *p << " ";
}
return 0;
}</source>
<pre class=codeResult>List printed forwards:
0 1 2 3 4 5 6 7 8 9
List printed backwards:
9 8 7 6 5 4 3 2 1 0</pre>

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C++ Tutorial/list/list begin end - История изменений

в 14:21, 25 мая 2010

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