用标准c++实现string与各种类型之间的转换

 using namespace std;

using namespace boost;

int main(void)

try

{

//以下是内置类型向string转换的解决方案

//lexical_cast优势明显

int ival;

char cval;

ostringstream out_string;

string str0;

string str1;

ival = 100;

cval = 'w';

out_string << ival << " " << cval;

str0 = out_string.str();

str1 = lexical_cast(ival) + lexical_cast(cval);

cout << str0 << endl; cout << str1 << endl;

//以下是string向内置类型转换的解决方案

//几乎和stringstrem相比，lexical_cast就是类型安全的，

int itmpe;

char ctmpe;

str0 = "100k";

str1 = "100h";

istringstream in_string( str0 );

in_string >> itmpe >> ctmpe;

cout << itmpe << " " << ctmpe << endl;

itmpe = lexical_cast(str1);

ctmpe = lexical_cast(str1);

system( "PAUSE" );

return 0;

} catch(bad_lexical_cast e)

{ cout << e.what() << endl; cin.get(); }