to #include or not to #include
When using functions that are in the standard library, I find that to use them I sometimes have to include the appropriote header, and sometimes I do not. e.g the strlen() function: I can use it without including the header it needs....
can anyone tell me why?
p.s. Just thought it would be fun to tell ya´ll, I´m in Mexico at an internet cafe, the cost is 10 pesos (aprx. $1 USD) per hour...not bad... and since I´m not near a compiler, I´m not sure for certain whether the strlen() will work without a header. sorry if it doesn´t.
(using vc++ .net at home)