Scanf and printf in c++

#1

Are scanf and printf allowed to be used in c++ ?
if yes -> then what are the functionality, and how to use them !

#2

Yes

scanf() :
The scanf() function in C++ is used to read the data.
ex:

 int n;
   scanf("%d",&n);  // simply read the data from user

printf():
printf() function in C++ is used to write a formatted string

ex:

   printf("hii"); // it simply print hii
    int n=10;
  printf("value of n is %d",n); // print value of n is 10

if you have further doubt feel free to ask

#3

@asaurabh_26
is it always -> %d
in scanf and printf

also,

if I use following two commands:-

ios_base::sync_with_stdio(false);
cin.tie(NULL);

then can I ALWAYS ignore the use of printf and scanf and use cin, cout instead WITH NO DISADVANTAGE

#4

NO, %d for integers

ios_base::sync_with_stdio(false);

This disables the synchronization between the C and C++ standard streams. By default, all standard streams are synchronized, which in practice allows you to mix C- and C+±style I/O and get sensible and expected results. If you disable the synchronization, then C++ streams are allowed to have their own independent buffers, which makes mixing C- and C+±style I/O an adventure.

Also keep in mind that synchronized C++ streams are thread-safe (output from different threads may interleave, but you get no data races).

cin.tie(NULL);

This unties cin from cout . Tied streams ensure that one stream is flushed automatically before each I/O operation on the other stream.