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Diffstat (limited to 'doc/src/snippets/code/doc_src_q3valuevector.cpp')
-rw-r--r-- | doc/src/snippets/code/doc_src_q3valuevector.cpp | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/doc/src/snippets/code/doc_src_q3valuevector.cpp b/doc/src/snippets/code/doc_src_q3valuevector.cpp new file mode 100644 index 0000000..8af1568 --- /dev/null +++ b/doc/src/snippets/code/doc_src_q3valuevector.cpp @@ -0,0 +1,125 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +//! [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] |