Putting Numbers into Strings

• Code for this is located in intsToString.C
• The C way
  • Output in C is done with the printf family of functions.
  • #include <stdio.h>
  • int print ( const char * format, ... );
  • printf("hello %s, you are %d years old\n", name, age);
  • %d matches integers, %f float, ...
  • More info
  • On success, returns the number of characters printed.
  • sprintf will print to a string.
  • The string is an array of characters and it will terminate with the null.
  • int sprintf ( char * str, const char * format, ... );
  • sprintf(word, "%s is %d years old", name, age);
  • It is richer than this, but this will do.
• The C++ way.
  • String streams are derived from streams.
  • #include <sstream>
  • ostringstream foo;
  • You can to such a stream in a the normal way (<<)
  • the .str() method allows you to get and set the string.