I saw some programs including <iostream> and <ostream> simultaneously. Why?
Thanks for your kind reply.
I saw some programs including <iostream> and <ostream> simultaneously. Why? Thanks for your kind
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I saw some programs including <iostream> and <ostream> simultaneously. Why?
Thanks for your kind reply.
<iostream>is not the combination of<istream>and<ostream>. It merely definesstd::cin,std::coutand related objects. To actually do anything useful withstd::cout, you still need<ostream>. Now, by C++ rules it’s possible that some implementations actually do include<ostream>in<iostream>, but you shouldn’t rely on this.