Templates in depth(Chapter 3 of Thinking in C++ Vol 2)

StringConv#ifndef STRINGCONV_H

#defineSTRINGCONV_H

#include<string>

#include<sstream>



template<typename T>

T fromString(conststd::string&s)

{

std::istringstreamis(s);

T t;

is>>t;

returnt;

}



template<typename T>

std::stringtoString(constT&t)

{

std::ostringstream s;

s<<t;

returns.str();

}

#endif

StringConv.cpp1#include"StringConv.h"

2#include<iostream>

3#include<complex>

4usingnamespacestd;

5

6intmain()

7{

8inti=1234;

9cout<<"i ==""<< toString(i) <<""n";

10

11floatx=567.89;

12cout<<"x ==""<< toString(x) <<""n";

13

14complex<float>c(1.0,2.0);

15cout<<"c ==""<< toString(c) <<""n";

16cout<<endl;

17

18i=fromString<int>(string("1234"));

19cout<<"i =="<<i<<endl;

20x=fromString<float>(string("567.89"));

21cout<<"x =="<<x<<endl;

22c=fromString<complex<float>>(string("(1.0, 2.0"));

23cout<<"c =="<<c<<endl;

24

25}原文链接: https://www.cnblogs.com/zhtf2014/archive/2010/12/25/1916820.html

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