USING C++

This is a variation on the last lab where the task was to save XYZ Company Corp. employees information in a file. The goal here is to store employee information using C++ structures. In order to store multiple employees we will use an array of structures. The goal is get a sense of how this array is stored in memory by printing memory addresses.

#include  #include  #include  

using namespace std;

char Alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; char alphabet[] = "abcdefghijklmnopqrstuvwxyz"; char digits[] = "0123456789"; 

// Converts a character between 0 and 9 // to an integer value int char_to_int(char c) {

// TO DO

}

// Picks a random char from an array of // characters with length n char choose_char(char* ptr_c, int n) {

// TO DO

}

// Generates a random name having length between  

Laboratory 3 - CSCI 1061U

1 of 3

// 5 and 15 letters. // The first letter of the name is capitalized. std::string gen_random_name(int min_len, int max_len) {

 std::string n; 

// TO DO

return n; }

//

struct Employee { std::string firstname; std::string lastname; char skill; // Between 0 and 9 int bonus; // Between 0 and 9 - tied to skill

}; const int NUM_EMPLOYEES = 5; 

void diagnostics_mem_layout(Employee* employees, int n) { 

 //-------------------------------------------------------- // Task 1: Print the address for employee 0 to 4  

 cout << "Address of the 0th employee: " << endl; cout << "Address of the 1th employee: " << endl; cout << "Address of the 2th employee: " << endl; cout << "Address of the 3th employee: " << endl; cout << "Address of the 4th employee: " << endl; 

 //-------------------------------------------------------- // Task 2: Compute the offset between employee 2 and 3, and // between employee 0 and 1. Is it the same?  

 cout << "Offset between employee 2 and 3: " << endl; cout << "Offset between employee 0 and 1: " << endl; 

 //-------------------------------------------------------- // Task 3: How much space does employee 0-4 takes in the memory? // // Use sizeof() to compute the size of the Employee struct  

 cout << "Size of employee 0: " << endl; cout << "Size of employee 1: " << endl; cout << "Size of employee 2: " << endl; cout << "Size of employee 3: " << endl; cout << "Size of employee 4: " << endl; 

 // Task 3 - part 2: Hmmm. Does every employee takes the same amount of // space in the memory? Change the min and max length for names and see // if you get the same result. If you get the same result, explain // why this is so?  

// TO DO

// Task 3 - part 3: Use the offset that you computed in Task 2 above // to confirm that the offset is similar to the size of each array entry.  

// TO DO

 //-------------------------------------------------------- // Task 4: Print the memory address where skill level and bonus for // employee 3 is stored. How much space skill level takes and how // much space bonus takes? // // You'll notice that you need to cast to address of skill, which is a char, // to (void *). This is because the << operator is treating this as // a char array. // // Pointers are arrays are intimately tied.  

 cout << "Skill for employee 3: " << endl; 

 cout << "Bonus for employee 3: " << endl; } 

int main() {

 srand(time(NULL)); 

 // Array of employees  

 Employee employees[NUM_EMPLOYEES]; 

for (int i=0; i

}

// Print

for (int i=0; i

 cout << "\tbonus: " << endl; } 

 // Call the following function to complete the following tasks  

 diagnostics_mem_layout(employees, NUM_EMPLOYEES); 

return 0;