一个完整的C++程序SpreadSheet - 1) 类的声明和定义-白红宇

1. SpreadsheetCell.h

#pragma once#include 
     
      class SpreadsheetCell{public:    void setValue(double inValue);    double getValue() const;    void setString(const std::string& inString);    const std::string& getString() const;private:    std::string doubleToString(double inValue) const;    double stringToDouble(const std::string& inString) const;    double mValue;    std::string mString;};

2. SpreadsheetCell.cpp

#include "SpreadsheetCell.h"#include 
     
      #include 
      
       using namespace std;void SpreadsheetCell::setValue(double inValue){    mValue = inValue;    mString = doubleToString(mValue);}double SpreadsheetCell::getValue() const{    return mValue;}void SpreadsheetCell::setString(const string& inString){    mString = inString;    mValue = stringToDouble(mString);}const string& SpreadsheetCell::getString() const{    return mString;}string SpreadsheetCell::doubleToString(double inValue) const{    ostringstream ostr;    ostr << inValue;    return ostr.str();}double SpreadsheetCell::stringToDouble(const string& inString) const{    double temp;    istringstream istr(inString);    istr >> temp;    if (istr.fail() || !istr.eof()) {        return 0;    }    return temp;}

3. SpreadSheetCellInStackTest.cpp

(在堆栈中创建并使用对象)

#include 
     
      #include "SpreadsheetCell.h"#include "SpreadSheetCellInStackTest.h"using namespace std;void SpreadSheetCellInStackTest::run(){    SpreadsheetCell myCell, anotherCell;    myCell.setValue(6);    anotherCell.setString("3.2");    cout << "cell 1: " << myCell.getValue() << endl;    cout << "cell 2: " << anotherCell.getValue() << endl;}