Can I use scanf and printf in C ++?

Closed due to the fact that the essence of the question is not clear to the participants of Xander , Stranger in the Q , German Borisov , LFC , aleksandr barakin 12 Apr at 13:39 .

Try to write more detailed questions. To get an answer, explain what exactly you see the problem, how to reproduce it, what you want to get as a result, etc. Give an example that clearly demonstrates the problem. If the question can be reformulated according to the rules set out in the certificate , edit it .

  • 6
    Yes You can. - Harry
  • one
    The question in some sense sounds like a joke "Doctor, can I play the violin after the operation?" - AnT
  • Yes, you will laugh;) - Zars.Stars

2 answers 2

According to the C ++ standard (C ++ 17, 20.2 The C standard library)

The C ++ standard library also makes it possible to use it.

and (20.5.1.2 Headers)

3 The standard library are provided in the additional headers shown in Table 17

in which (that is, in the table) the header <cstdio> is also indicated, which contains, in particular, the scanf and printf functions.

And further

It is noted that it was through the use of the document. In the C ++ standard library, however, the declarations should be included within the namespace scope (6.3.6) of the namespace std. It is unspecified whether these names are given through through the use of a global law (10.3.3).

The latter means that C-functions are not necessarily placed in the global namespace. From this it follows that if you do not use the using-directive in your program

 using namespace std;

then the program with reference to these functions will be structurally as follows:

 #include <cstdio> // ... int main() { // ... std::printf( "Hello %s\n", "Zars.Stars" ); // ... }

That is, in the general case you should include the <cstdio> header and use qualified names like std::printf .

    Yes. Here is an example:

     /* scanf printf example */ #include <stdio.h> int main () { char str [80]; printf ("Enter your name: "); scanf ("%79s",str); printf ("Hello, %s.\n",str); return 0; }
    • one
      But probably it is better to use <cstdio> . - HolyBlackCat