Thread: What is the differene between Console I/O function and Stream I/O Function

What is the differene between Console I/O function like getchar putchar, gets , puts and Stream I/O Function like cin.get , cout.put ,cin.getline , cout.write ?

Eg..getchar() is used to take a character and cin.get() is also used to do that....and gets() is used to take string but cin.getline() can also perform that.....plese tell me the difference in these I/O Function..

though console as well as stream I/O function can be used for I/O....which is good to use......and why....plese explain in simple word .....I am a beginner in c++..

The getchar putchar, gets , puts functions are C-stdio functions being used to retrieve information from the console.

The cin.... functions are C++ stream functions that also retrieve information from the console.

.which is good to use

In a C++ program I recommend you use the C++ streams. They are much less error prone, IMO. Leave the C-stdio functions for C programs.


Jim

SO is there any difference Between these function ..........i mean to say that getchar() do the same task as cin.get()....or gets() to same task as cin.getline() .......so which is to use and why not to use other ??


i am asking in c++ programming

SO is there any difference Between these function

Yes getchar() is a C function cin.get() is a C++ function.

.or gets() to same task as cin.getline()

Yes gets() is a very very dangerous C function that should never ever be used. Never use any function that doesn't limit the number of characters that it will try to retrieve into a C-string. The C++ cin.getline() function limits the number of characters it will try to retrieve.

Again if you're writing a C++ forget about the C-stdio functions and use the proper C++ methods. And avoid mixing the two different input methods.

Jim

plese help me on this topic

Originally Posted by Rohit Kumar

so....is there any another difference between these function except that getchar() belong to C function and cin.get() belongs to c++ function.....PLESE HELP....REPLY FAST

I'm sorry that we didn't hit on the exact wording used on the multiple-choice test you're taking, but as you can see from the posts above there are basically no similarities and all differences (at a very high level they are the same in that they are "get information and put it in a variable", but at just about any level lower than that they are different (they work on different objects, with different syntax, and with different properties for things like reading formats)). Perhaps thinking about what has been said will let you answer whatever question it is that you have; or perhaps you can refine your question if there's some aspect that you're still confused about.