C++/Vector/vector definition
Storing Specific Values in an Existing Container
<source lang="cpp">
- include <string>
- include <vector>
- include <iostream>
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 char* s[] = { "A", "B", "C", "D", "Don"t know" }; vector<string> answers( s, s+ sizeof( s ) / sizeof( s[0] ) ); print( answers ); const char* s1[] = { "A", "C", "B","D", "V", "O" }; answers.assign( s1, s1 + sizeof( s1 ) / sizeof( s1[0] ) ); print( answers );
}
</source>
vector declaration
<source lang="cpp">
- include <iostream>
using std::cout; using std::cin; using std::endl;
- include <iomanip>
using std::setw;
- include <vector>
using std::vector; int main() {
vector< int > integers1( 7 ); // 7-element vector< int > vector< int > integers2( 10 ); // 10-element vector< int > size_t i; cout << integers1.size() << endl; for ( i = 0; i < integers1.size(); i++ ){ cout << integers1[ i ]; } cout << integers2.size() << endl; for ( i = 0; i < integers2.size(); i++ ){ cout << integers2[ i ]; } for ( size_t i = 0; i < integers1.size(); i++ ) integers1[ i ] = i; for ( size_t i = 0; i < integers2.size(); i++ ) integers2[ i ] = i; for ( i = 0; i < integers1.size(); i++ ){ cout << integers1[ i ]; } for ( i = 0; i < integers2.size(); i++ ){ cout << integers2[ i ]; }
return 0;
} /* 7 000000010 000000000001234560123456789
*/ </source>
vector"s copy constructor
<source lang="cpp">
- include <iostream>
using std::cout; using std::cin; using std::endl;
- include <iomanip>
using std::setw;
- include <vector>
using std::vector; int main() {
vector< int > integers1( 7 ); // 7-element vector< int > vector< int > integers2( 10 ); // 10-element vector< int > size_t i; for ( i = 0; i < integers1.size(); i++ ){ cout << integers1[ i ]; } for ( i = 0; i < integers2.size(); i++ ){ cout << integers2[ i ]; } vector< int > integers3( integers1 ); // copy constructor cout << integers3.size() << endl; for ( i = 0; i < integers3.size(); i++ ){ cout << integers3[ i ]; } return 0;
} /* 000000000000000007 0000000
*/ </source>