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//! [0]
#include <qvaluevector.h>
#include <qstring.h>
#include <stdio.h>
class Employee
{
public:
Employee(): s(0) {}
Employee( const QString& name, int salary )
: n( name ), s( salary )
{ }
QString name() const { return n; }
int salary() const { return s; }
void setSalary( int salary ) { s = salary; }
private:
QString n;
int s;
};
int main()
{
typedef Q3ValueVector<Employee> EmployeeVector;
EmployeeVector vec( 3 ); // vector of 3 Employees
vec[0] = Employee( "Bill", 50000 );
vec[1] = Employee( "Steve", 80000 );
vec[2] = Employee( "Ron", 60000 );
Employee joe( "Joe", 50000 );
vec.push_back( joe ); // vector expands to accommodate 4 Employees
joe.setSalary( 70000 );
EmployeeVector::iterator it;
for( it = vec.begin(); it != vec.end(); ++it )
printf( "%s earns %d\n", (*it).name().latin1(), (*it).salary() );
return 0;
}
//! [0]
//! [1]
Bill earns 50000
Steve earns 80000
Ron earns 60000
Joe earns 50000
//! [1]
//! [2]
Q3ValueVector<int> vec1; // an empty vector
vec1[10] = 4; // WARNING: undefined, probably a crash
Q3ValueVector<QString> vec2(25); // initialize with 25 elements
vec2[10] = "Dave"; // OK
//! [2]
//! [3]
void func( Q3ValueVector<int>& vec )
{
if ( vec.size() > 10 ) {
vec[9] = 99; // OK
}
};
//! [3]
//! [4]
Q3ValueVector<int> vec( 3 );
vec.push_back( 1 );
vec.push_back( 2 );
vec.push_back( 3 );
...
if ( !vec.empty() ) {
// OK: modify the first element
int& i = vec.front();
i = 18;
}
...
Q3ValueVector<double> dvec;
double d = dvec.back(); // undefined behavior
//! [4]
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