#include #include #include #define EMPS_SIZE 20 #define SSN_SIZE 9 #define MAX_EMPS 19 typedef struct {   int salary;   int yearBorn;   char ssn[SSN_SIZE];   char * name; } Employee; Employee * emps[EMPS_SIZE]; int totalEmps = 0;   void main(void) {     int end = 1;     char * command;     char buff[256];     char * findEmp;     char findBuff[256];     char * sortType;     char sortBuff[256];     char hire[] = "HIRE";     char list[] = "LIST";     char quit[] = "QUIT";     char find[] = "FIND";     char fire[] = "FIRE";     char _sort[] = "SORT";     char salary[] = "SALARY";     char name[] = "NAME";   char save[] = "SAVE";     printf("Welcome to the Employee Manager dashboard!\n");     while (end) {       printf("Would you like to HIRE, LIST, FIND, FIRE, SORT,SAVE or QUIT?\n\n");       scanf("%s", buff);       command = malloc(strlen(buff + 1));       strcpy(command, buff);       printf("You entered the command: %s\n\n", command);       if (!strcmp(command, hire)) {         createEmployee();       } else if (!strcmp(command, list)) {         listEmployees();       } else if (!strcmp(command, find)) {         printf("Enter an employee name, to find if they are a current employee:\n\n");         scanf("%s", findBuff);         findEmp = malloc(strlen(findBuff + 1));         strcpy(findEmp, findBuff);         findEmployee(findEmp);       } else if (!strcmp(command, fire)) {         printf("Enter an employee name, to fire\n\n");         scanf("%s", findBuff);         findEmp = malloc(strlen(findBuff + 1));         strcpy(findEmp, findBuff);         fireEmployee(findEmp);       } else if (!strcmp(command, _sort)) {         printf("Would you like to sort by SALARY or NAME?\n\n");         scanf("%s", sortBuff);         sortType = malloc(strlen(sortBuff + 1));         strcpy(sortType, sortBuff);         if (!strcmp(sortType, name)) {           printf("sorting by name\n\n");           sort(emps, EMPS_SIZE, nameComp);           listEmployees();         } else if (!strcmp(sortType, salary)) {           printf("sorting by salary\n\n");           sort(emps, EMPS_SIZE, salaryComp);           listEmployees();         } else {           printf("Improper sort type entered, exiting to main menu\n\n");         }       } else if (!strcmp(command, save)) {         printf("Enter file name:\n\n");       char filename[15];       scanf("%s", filename);       FILE *f;       f = fopen(filename,"wb");         writeEmpToFile(emps,f);     } else if (!strcmp(command, quit)) {         printf("Quitting the managers dashboard!\n\n");         end = 0;       } else {         printf("Please enter a proper command\n\n");       }     }   }

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
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define EMPS_SIZE 20

#define SSN_SIZE 9

#define MAX_EMPS 19

typedef struct {

  int salary;

  int yearBorn;

  char ssn[SSN_SIZE];

  char * name;

}

Employee;

Employee * emps[EMPS_SIZE];

int totalEmps = 0;

 

void main(void) {

 

  int end = 1;

 

  char * command;

 

  char buff[256];

 

  char * findEmp;

 

  char findBuff[256];

 

  char * sortType;

 

  char sortBuff[256];

 

  char hire[] = "HIRE";

 

  char list[] = "LIST";

 

  char quit[] = "QUIT";

 

  char find[] = "FIND";

 

  char fire[] = "FIRE";

 

  char _sort[] = "SORT";

 

  char salary[] = "SALARY";

 

  char name[] = "NAME";

  char save[] = "SAVE";

 

  printf("Welcome to the Employee Manager dashboard!\n");

 

  while (end) {

 

    printf("Would you like to HIRE, LIST, FIND, FIRE, SORT,SAVE or QUIT?\n\n");

 

    scanf("%s", buff);

 

    command = malloc(strlen(buff + 1));

 

    strcpy(command, buff);

 

    printf("You entered the command: %s\n\n", command);

 

    if (!strcmp(command, hire)) {

 

      createEmployee();

 

    } else if (!strcmp(command, list)) {

 

      listEmployees();

 

    } else if (!strcmp(command, find)) {

 

      printf("Enter an employee name, to find if they are a current employee:\n\n");

 

      scanf("%s", findBuff);

 

      findEmp = malloc(strlen(findBuff + 1));

 

      strcpy(findEmp, findBuff);

 

      findEmployee(findEmp);

 

    } else if (!strcmp(command, fire)) {

 

      printf("Enter an employee name, to fire\n\n");

 

      scanf("%s", findBuff);

 

      findEmp = malloc(strlen(findBuff + 1));

 

      strcpy(findEmp, findBuff);

 

      fireEmployee(findEmp);

 

    } else if (!strcmp(command, _sort)) {

 

      printf("Would you like to sort by SALARY or NAME?\n\n");

 

      scanf("%s", sortBuff);

 

      sortType = malloc(strlen(sortBuff + 1));

 

      strcpy(sortType, sortBuff);

 

      if (!strcmp(sortType, name)) {

 

        printf("sorting by name\n\n");

 

        sort(emps, EMPS_SIZE, nameComp);

 

        listEmployees();

 

      } else if (!strcmp(sortType, salary)) {

 

        printf("sorting by salary\n\n");

 

        sort(emps, EMPS_SIZE, salaryComp);

 

        listEmployees();

 

      } else {

 

        printf("Improper sort type entered, exiting to main menu\n\n");

 

      }

 

    } else if (!strcmp(command, save)) {

 

      printf("Enter file name:\n\n");

      char filename[15];

      scanf("%s", filename);

      FILE *f;

      f = fopen(filename,"wb");  

      writeEmpToFile(emps,f);

    } else if (!strcmp(command, quit)) {

 

      printf("Quitting the managers dashboard!\n\n");

 

      end = 0;

 

    } else {

 

      printf("Please enter a proper command\n\n");

 

    }

 

  }

 

}

 

 

Implement a function readEmpFromFile that takes a FILE * as the only argument and
returns a pointer to a struct employee. This function should read the information from
the file (reversing what writeEmp ToFile does), create a new employee and fill in the
data. If the FILE has no more info (is at end of file), this function should return NULL.
This function must also ensure any employee actually created (not the NULL) is added
to the array (as is done in createEmployee).
Change main to load employees from a file if a command line argument is given to the
program (using your readEmpFromFile function you just wrote).
Transcribed Image Text:Implement a function readEmpFromFile that takes a FILE * as the only argument and returns a pointer to a struct employee. This function should read the information from the file (reversing what writeEmp ToFile does), create a new employee and fill in the data. If the FILE has no more info (is at end of file), this function should return NULL. This function must also ensure any employee actually created (not the NULL) is added to the array (as is done in createEmployee). Change main to load employees from a file if a command line argument is given to the program (using your readEmpFromFile function you just wrote).
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