静态库

MathFunctions.pro

#-------------------------------------------------
#
# Project created by QtCreator 2013-07-23T19:50:46
#
#-------------------------------------------------

QT       -= gui

TARGET = MathFunctions
TEMPLATE = lib
CONFIG += staticlib

SOURCES += mathfunctions.cpp

HEADERS += mathfunctions.h
unix:!symbian {
    maemo5 {
        target.path = /opt/usr/lib
    } else {
        target.path = /usr/lib
    }
    INSTALLS += target
}

mathfunctions.h

#ifndef MATHFUNCTIONS_H
#define MATHFUNCTIONS_H


class MathFunctions
{
    
public:
    MathFunctions();

    static unsigned long int factorial(unsigned int n);
};

#endif // MATHFUNCTIONS_H

mathfunctions.cpp

#include "mathfunctions.h"

MathFunctions::MathFunctions()
{
}
unsigned long int
MathFunctions::factorial(unsigned int n)
{
    switch(n)
    {
        case 0: return 0;
        case 1: return 1;
        default: return n * factorial(n-1);
    }
}

链接静态库

#-------------------------------------------------
#
# Project created by QtCreator 2013-07-23T20:43:19
#
#-------------------------------------------------

QT       += core

QT       -= gui


CONFIG(release, debug|release):
DEFINES += QT_NO_DEBUG_OUTPUT

TARGET = MathFunctionsTest
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app


SOURCES += main.cpp


win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../build-MathFunctions-Desktop_Qt_5_3_0_MinGW_32bit-Debug/release/ -lMathFunctions
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../build-MathFunctions-Desktop_Qt_5_3_0_MinGW_32bit-Debug/debug/ -lMathFunctions
else:unix: LIBS += -L$$PWD/../build-MathFunctions-Desktop_Qt_5_3_0_MinGW_32bit-Debug/ -lMathFunctions

INCLUDEPATH += $$PWD/../MathFunctions
DEPENDPATH += $$PWD/../MathFunctions

win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../build-MathFunctions-Desktop_Qt_5_3_0_MinGW_32bit-Debug/release/libMathFunctions.a
else:win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../build-MathFunctions-Desktop_Qt_5_3_0_MinGW_32bit-Debug/debug/libMathFunctions.a
else:win32:!win32-g++:CONFIG(release, debug|release): PRE_TARGETDEPS += $$PWD/../build-MathFunctions-Desktop_Qt_5_3_0_MinGW_32bit-Debug/release/MathFunctions.lib
else:win32:!win32-g++:CONFIG(debug, debug|release): PRE_TARGETDEPS += $$PWD/../build-MathFunctions-Desktop_Qt_5_3_0_MinGW_32bit-Debug/debug/MathFunctions.lib
else:unix: PRE_TARGETDEPS += $$PWD/../build-MathFunctions-Desktop_Qt_5_3_0_MinGW_32bit-Debug/libMathFunctions.a

main.cpp

#include <QCoreApplication>
#include <QDebug>
#include "mathfunctions.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    int values[] = { 6, 7, 8 };

    for(int i = 0; i < sizeof(values)/sizeof(int); i++)
    {
        qDebug() << values[i]
                 << "! = "
                 << MathFunctions::factorial(values[i]);
    }

    return a.exec();
}