用ostringstream与istringstream转化字符串
#include <sstream> //头文件是sstream
string doubleToString(double inValue) const
{
ostringstream ostr; //创建一个流
ostr << inValue; //把值传递如流中
return ostr.str();
}
double stringToDouble(string inString) const
{
double temp;
istringstream istr(inString); //从string对象inString中读取字符
istr >> temp;
if(istr.fail() || !istr.eof())
{
return 0; //设定非数字的字符串值为0
}
return temp;
}