Can cin and cout be used in the function definition of user defined functions in C plus plus?

Answer 1

The cin and cout entities (they are not statements) are C++ iostream library objects that allows access to "standard input" and "standard output". In C++, the statement cout << "Hello World!"; is similar to the C statement printf("Hello World!\n"); Similarly, cin >> variable; allows reading from standard input to a variable.

Answer 2

To use these you must use:

#include <iostream>

then define a variable, doesn't matter what type, could be anything (int, char, char*) like so:

int a;

int b;

To get the values for these you must use cin:

cin >> a;

cin >> b;

The to output them once they have been allocated a value:

cout >> a;

cout >> b;

or you could do math with them such as:

cout << (((a+b)b)/a)b To use these you must use:

#include <iostream>

then define a variable, doesn't matter what type, could be anything (int, char, char*) like so:

int a;

int b;

To get the values for these you must use cin:

cin >> a;

cin >> b;

The to output them once they have been allocated a value:

cout >> a;

cout >> b;

or you could do math with them such as:

cout << (((a+b)b)/a)b

Answer 3

Yes. In actual fact that is the only place you can use them, period.