Question

1. In a function that gets a value from the keyboard and communicates that value to the main
function via a parameter, the parameter used is considered __________.

2. In a function that receives a value from the main function via a parameter and then
displays the parameter value on the screen, that parameter is considered __________.

3. In a function that receives one parameter value from the main program and passes back a
changed value of the parameter, that parameter is considered __________.

4. When the body of a function is implemented temporarily with just a printf call that
displays a message reporting that the function was entered, the programmer is using
__________.

5. What is displayed by this program?
#include <stdio.h>
void seven(int *xp);

int
main(void)
{
int x, y;
x = 5; y = 6;
seven(&x);
seven(&y);
printf("%4d%4d\n", x, y);
return(0);
}
void
seven(int *xp)
{
int y;

y = *xp + 2;
*xp = y * 3;
}

6. When a programmer writes a driver and individually tests a single function before inserting
the function in a program system, the programmer is performing __________.

7. The "*" symbol means:

8. What can be determined by the following declaration?
FILE*inputData;

9. Accessing the contents of memory using a pointer variable that contains the address of that
memory location is called _________.

10. Use ________ testing to verify the correctness of a single function in a program.

11. Declare a pointer variable called "ptr" that can point to a memory address of type integer.

Answer 1

Answers:

1. Actual Parameters

2. Formal Parameters

3. Pass by value

4. Pass by reference

5. 21 24

6. Unit testing

7. * makes the variable a pointer

8. a. We use a structure pointer of file type to declare a file

b. *inputData is the FILE pointer (FILE *inputData), which will hold the reference to the opened (or created) file

9. Dereference operator

10. Unit testing

11. int x=10;
int *ptr;
ptr = &x;