long math problems

hi i really need help on making c++ problems about the long math problems like long addition,subtraction, multiplication and division i've only began learning a while ago so i just needed some samples or algorythms for this, if not both would be appreciated, if not a link to some guides about this
example:
358
+ 235
---------
593

 

That's not exactly long...I recently wrote up a little program to do just this. http://mizrahimelech.xtreemhost.com/c-tutorial-1/ <<-- Link to my tutorial.

 

well you can use floating point or even double, and if you need "big" numbers use long double

 

Related to math calculation using c++
you can take help form
stackoverflow.com/questions/245740/which-variables-should-i-typecast-when-doing-math-operations-in-cc