string和各内置类型的互换方法（stringstream的一种用法）

/*和c的转换函数比起来用法更为隐蔽，对初学者来说不够直观。*/

#include "iostream"

#include "sstream"

#include "string"

#include "cstdlib"

using namespace std;

int main(void)

{

/*以下是内置类型向string转换的解决方案*/

int ival;

char cval;

ostringstream out_string;

string str;

ival = 100;

cval = 'w';

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

str = out_string.str();

cout << str << endl;

/*以下是string向内置类型转换的解决方案*/

int itmpe;

char ctmpe;

str = "100k";

istringstream in_string( str );

in_string >> itmpe >> ctmpe;

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

system( "PAUSE" );

return 0;

}