1. Write a readEmployee function that takes a pointer to an employee struct and fills in the details. It should prompt the user for each field, then read the data from the user and store it in the struct passed in. Be careful to appropriately copy the string values. You do not need to worry about checking for buffer overflow. 2. Define a createEmployee function that will allocate the memory for an employee structure and return it. Before returning the pointer, it should call your readEmployee function to fill in the data. 3. Change your main function to call createEmployee and hold the pointer returned. This pointer should then be passed into you display function. • Q1: How many total calls to malloc are made during createEmployee (including readEmployee and anything it calls)? • Q2: If the employee's name is Joe Smith, how much total memory is allocated for the structure and the name (not just for the name)? • Q3: Many people put the SSN in a char[9] field (I kind of encouraged it). Is that big enough to hold the ssn string? Why didn't it create a problem? 4. Write a releaseEmployee function that will free all the memory allocated for the employee whose pointer is passed in as the argument. 5. Modify main to call releaseEmployee after the display calI. You main function should now include a pointer variable declaration, a call to createEmployee, a call to display and a call to releaseEmployee. • Q4: How many calls to free do you need to make? Does it agree with the number of calls to malloc that were made? • Q5: What would happen if you passed in the address of the initialized global variable into releaseEmployee? Would anything different happen if you passed in the address of a local variable (on the stack)?
1. Write a readEmployee function that takes a pointer to an employee struct and fills in the details. It should prompt the user for each field, then read the data from the user and store it in the struct passed in. Be careful to appropriately copy the string values. You do not need to worry about checking for buffer overflow. 2. Define a createEmployee function that will allocate the memory for an employee structure and return it. Before returning the pointer, it should call your readEmployee function to fill in the data. 3. Change your main function to call createEmployee and hold the pointer returned. This pointer should then be passed into you display function. • Q1: How many total calls to malloc are made during createEmployee (including readEmployee and anything it calls)? • Q2: If the employee's name is Joe Smith, how much total memory is allocated for the structure and the name (not just for the name)? • Q3: Many people put the SSN in a char[9] field (I kind of encouraged it). Is that big enough to hold the ssn string? Why didn't it create a problem? 4. Write a releaseEmployee function that will free all the memory allocated for the employee whose pointer is passed in as the argument. 5. Modify main to call releaseEmployee after the display calI. You main function should now include a pointer variable declaration, a call to createEmployee, a call to display and a call to releaseEmployee. • Q4: How many calls to free do you need to make? Does it agree with the number of calls to malloc that were made? • Q5: What would happen if you passed in the address of the initialized global variable into releaseEmployee? Would anything different happen if you passed in the address of a local variable (on the stack)?
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Below is the starting code for this homework assignment
#include <stdio.h>
//1.
struct employees
{
char name[20];
int ssn[9];
int yearBorn, salary;
};
//2.
struct employees e = {"kim deen", {1,2,3,4,5,6,7,8,9}, 1998, 35000};
//3.
void display(struct employees *e)
{
printf("%s", e->name);
printf(" %d%d%d-%d%d-%d%d%d%d", e->ssn[0],e->ssn[1],e->ssn[2],e->ssn[3],e->ssn[4],e->ssn[5],e->ssn[6],e->ssn[7],e->ssn[8]);
printf(" %d", e->yearBorn);
printf("\n$%d.", e->salary);
}
int main()
{
display(&e);
return 0;
}
![Although it will no longer be used, please leave the earlier global variable with the initialized data in the program.
1. Write a readEmployee function that takes a pointer to an employee struct and fills in the details. It should prompt the user for
each field, then read the data from the user and store it in the struct passed in.
Be careful to appropriately copy the string values. You do not need to worry about checking for buffer overflow.
2. Define a createEmployee function that will allocate the memory for an employee structure and return it. Before returning the
pointer, it should call your readEmployee function to fill in the data.
3. Change your main function to call createEmployee and hold the pointer returned. This pointer should then be passed into your
display function.
o Q1: How many total calls to malloc are made during createEmployee (including readEmployee and anything it calls)?
• Q2: If the employee's name is Joe Smith, how much total memory is allocated for the structure and the name (not just for
the name)?
• Q3: Many people put the SSN in a char[9] field (I kind of encouraged it). Is that big enough to hold the ssn string? Why
didn't it create a problem?
4. Write a releaseEmployee function that will free all the memory allocated for the employee whose pointer is passed in as the
argument.
5. Modify main to call releaseEmployee after the display call. You main function should now include a pointer variable
declaration, a call to createEmployee, a call to display and a call to releaseEmployee.
• Q4: How many calls to free do you need to make? Does it agree with the number of calls to malloc that were made?
• Q5: What would happen if you passed in the address of the initialized global variable into releaseEmployee? Would
anything different happen if you passed in the address of a local variable (on the stack)?
All done.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1e80766b-484f-4da5-a927-0c1cccc43380%2Fbe815884-8aaa-4b8a-bc2f-6f73dd91fe61%2Fek0b3oa_processed.png&w=3840&q=75)
Transcribed Image Text:Although it will no longer be used, please leave the earlier global variable with the initialized data in the program.
1. Write a readEmployee function that takes a pointer to an employee struct and fills in the details. It should prompt the user for
each field, then read the data from the user and store it in the struct passed in.
Be careful to appropriately copy the string values. You do not need to worry about checking for buffer overflow.
2. Define a createEmployee function that will allocate the memory for an employee structure and return it. Before returning the
pointer, it should call your readEmployee function to fill in the data.
3. Change your main function to call createEmployee and hold the pointer returned. This pointer should then be passed into your
display function.
o Q1: How many total calls to malloc are made during createEmployee (including readEmployee and anything it calls)?
• Q2: If the employee's name is Joe Smith, how much total memory is allocated for the structure and the name (not just for
the name)?
• Q3: Many people put the SSN in a char[9] field (I kind of encouraged it). Is that big enough to hold the ssn string? Why
didn't it create a problem?
4. Write a releaseEmployee function that will free all the memory allocated for the employee whose pointer is passed in as the
argument.
5. Modify main to call releaseEmployee after the display call. You main function should now include a pointer variable
declaration, a call to createEmployee, a call to display and a call to releaseEmployee.
• Q4: How many calls to free do you need to make? Does it agree with the number of calls to malloc that were made?
• Q5: What would happen if you passed in the address of the initialized global variable into releaseEmployee? Would
anything different happen if you passed in the address of a local variable (on the stack)?
All done.
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