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arithmetic.cpp
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115 lines (83 loc) · 2.42 KB
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#include <QString>
#include <QStringList>
#include "arithmetic.h"
QString add( QString &fore_ , QString &back_ )
{
if ( fore_[0] == '~' )
{
fore_[0] = '-' ;
}
if ( back_[0] == '~' )
{
back_[0] = '-' ;
}
QStringList fore_exp = fore_.split('/') ;
QStringList back_exp = back_.split('/') ;
double temp_result = fore_exp[0].toDouble()*back_exp[1].toDouble() + fore_exp[1].toDouble()*back_exp[0].toDouble() ;
QString result = QString("%1").arg(temp_result) ;
result += '/' ;
temp_result = fore_exp[1].toDouble() * back_exp[1].toDouble() ;
result += QString("%1").arg(temp_result) ;
return result ;
}
QString minus( QString &fore_ , QString &back_ )
{
if ( fore_[0] == '~' )
{
fore_[0] = '-' ;
}
if ( back_[0] == '~' )
{
back_[0] = '-' ;
}
QStringList fore_exp = fore_.split('/') ;
QStringList back_exp = back_.split('/') ;
double temp_result = fore_exp[0].toDouble()*back_exp[1].toDouble() - fore_exp[1].toDouble()*back_exp[0].toDouble() ;
QString result = QString("%1").arg(temp_result) ;
result += '/' ;
temp_result = fore_exp[1].toDouble() * back_exp[1].toDouble() ;
result += QString("%1").arg(temp_result) ;
return result ;
}
QString multi( QString &fore_ , QString &back_ )
{
if ( fore_[0] == '~' )
{
fore_[0] = '-' ;
}
if ( back_[0] == '~' )
{
back_[0] = '-' ;
}
QStringList fore_exp = fore_.split('/') ;
QStringList back_exp = back_.split('/') ;
double temp_result = fore_exp[0].toDouble()*back_exp[0].toDouble() ;
QString result = QString("%1").arg(temp_result) ;
result += '/' ;
temp_result = fore_exp[1].toDouble()*back_exp[1].toDouble() ;
result += QString("%1").arg(temp_result) ;
return result ;
}
QString devide( QString &fore_ , QString &back_ )
{
if ( fore_[0] == '~' )
{
fore_[0] = '-' ;
}
if ( back_[0] == '~' )
{
back_[0] = '-' ;
}
QStringList fore_exp = fore_.split('/') ;
QStringList back_exp = back_.split('/') ;
if ( back_exp[0] == "0" )
{
return "" ;
}
double temp_result = fore_exp[0].toDouble()*back_exp[1].toDouble() ;
QString result = QString("%1").arg(temp_result) ;
result += '/' ;
temp_result = fore_exp[1].toDouble()*back_exp[0].toDouble() ;
result += QString("%1").arg(temp_result) ;
return result ;
}