why does conio.h and iostream.h do not open while compiling programmes in c++ programming language? how to open them?

Question

zepp · Answer

They are libraries, what you wrote would grab informations from these libraries to execute functions appropriately.

zepp · Answer

E.g.: math operations are functions, although you do not have to write these functions, since */+- operations are already in these libraries.

anonymous · Answer

To open the file "iostream.h" and see its content, you can follow this path :
                                  C:\Dev-Cpp\include\c++\3.4.2\backward\
For "conio.h" :
                                  C:\Dev-Cpp\include\

Well that if you are using the Dev-C++ IDE.
Good luck.

zepp · Answer

If you have Code::Blocks

C:\Program Files (x86)\CodeBlocks\MinGW\lib\gcc\mingw32\4.4.1\include\c++