Question

1. definition contains the statements that make up the function.

2. definition contains the statements that make up the function.

3. Do you know what is a function definition?

4. Do you know what is the parameter of a function?

5. Do you know what is the return type of a function?

6. Do you know how to handle the function that returns the value?

7. Do you know how to use/call a function?

8. Do you know how to use/call a function that has a return type such as int, double, string, bool?

9. Do you know how to use/call a function that is a void type?

10. Do you know how to pass a parameter to a function?

11. Do you know why we put function declaration above the top of the int main()?

12. Do you know why we put function definition under the end of the int main()?

13. Do you know what it means to override a function?

14. Do you know what is an overloaded function?

15. Do you know what the symbol & means?

16. Do you know what const means when used as a function parameter?

17. Do you understand what you need to do when reading the function header?

18. Did you know that you can use/call a function inside another function?

19. Did you know that you can use/call the same function more than once?

Answer 1

Answer:

1) A function definition consists of the function declaration alongwith the body of the function inside the brackets.

Example:

int fun(int a, int b)

{

return a+b;

}

2) The parameters of a function are the variables written inside the brackets beside the name of the function and the values of the parameters are passed when the function is called.

In this, a and b variables are the parameters of the function in BOLD

int fun(int a, int b)

{

return a+b;

}

3) The return type of the function is the first thing written in the definition of the function which tells us aout what type of data the function will return.

In this case, int is the return type

int fun(int a, int b)

{

return a+b;

}

4) Yes, when the function which returns a value is called, a variable should be taken on the left side which collects the returned value.

Example:

If the function is :

int fun(int a, int b)

{

return a+b;

}

Call should be like this:

int c = fun(1, 2);

5) A function is called by writing its name along with the round bracket pair. If parameters are to be passed, values are written inside the brackets.

Example:

Example:

If the function is :

int fun(int a, int b)

{

return a+b;

}

Call should be like this:

int c = fun(1, 2);

6) The same way we called in the last example:

The return type is int

SO, we are calling by first declaring a variable or doing it in the same line.

Example:

If the function is :

int fun(int a, int b)

{

return a+b;

}

Call should be like this:

int c = fun(1, 2);

OR

int c;

c= fun(1,2);

7) The function which has a return type of void can be called directly without the need of any collection of return value:

Example:

If the function is :

void fun(int a, int b)

{

cout<<a+b;

}

Call should be like this:

fun(1, 2);

8) Yes, the parameters are passed during the function call, either directly value can be passed or a variable containing a value can be passed.

Example:

If the function is :

int fun(int a, int b)

{

return a+b;

}

Call should be like this and a and b are the parameters passed:

int a=1, b=2;

int c = fun(a, b);

9) We put function declaration at the top of int main() so that when we call the function inside the int main, the compiler can identify the name of the function as it is declared above. Due to the top down approach of the compiler, we need to do so.

10) We put all the definitions after main because declarations are enough to avoid a runtime error which are written before the main function.

11) When we write a function in the subclass which is having exactly same name, parameters and return type as a function in the superclass, then it is referred to as method overriding.

12) When two functions with same name but different number of parameters or order of parameters or type of parameters are delcared in a class, then it is called function overloading.

13) & symbol is the address-of operator which returns the address of any variable inside memory with which it is used.

14) When we use const inside the function parameters, it means that the function is not allowed to change the value of the parameter.

15) By looking at the function header, we can deduce about its return type, and what can we pass as the parameter to the function, but the functionality of the function can only be deduced by using the body of the function.

16) Yes, i know that we can call a function inside another function. As main() is also a function and we generally call functions inside main, so we can also call them inside any other function.

17) Yes, we can call the same function more than once. Infact, there is a problem solving technique called recursion which depends on the same phenomenon of calling one function more than once with different values.

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