Convert strings and numbers to each other

There are already functions in new C + + that implement this kind of functionality.

• Number to String

#include <sstream>//Include this to use string streams#include <string>intMain () {intNumber =1234; Std::ostringstream Ostr; //Output String StreamOSTR << number;//Use the string stream just like cout,//except the stream prints not to stdout but to a string.std::stringthenumberstring = Ostr.str ();//The str () function of the stream//returns the string. //Now thenumberstring is "1234"}

• String converted to Digital

#include <sstream><string>int  main () {   std::string " 1234 12.3 " ;   Std::istringstream ISTR (inputstring);    int I1, i2;    float F;    >> i1 >> F >> i2;    // I1 is 1234, F are 12.3,  i2 is.

See:

From

Convert strings and numbers to each other