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Using C programming and using Structures or Unions in your program, build a COVID vaccine registration form where any user can register by filling in their First Name, Last Name, Date of Birth (mm/dd/yyyy), Sex, Dose number (1 or 2). Date of previous dose, Type of vaccine (Pfizer, Moderna, Johnson&Johnsoh), Residential zipcode. Upon registration, the system must output a 8 letter alphanumeric code that will be unique to that user. The code is generated as Add functionality in your program such that it will display all the user's information on the screen (one item in each line). Show an evaluation trial for registering at least 10 users. For registration, for relevant questions, users must choose values based on the options provided (e.g. sex, options must be Male/Female/Do not wish to identify)

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Create a COVID vaccine registration form using C programming and Unions or Structures in your programme. Any user can register by providing their First Name, Last Name, Birth Date (mm/dd/yyyy), Sex, and Dose number (1 or 2). Date of last dose, Residential zipcode, vaccine manufacturer (Pfizer, Moderna, Johnson & Johnson).

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<time.h>

typedef union {

   int doseNumber;

   char vaccineType[25];

   int zipCode;

} vaccine;

typedef struct {

   char firstName[25];

   char lastName[25];

   char dob[25];

   char sex[25];

   vaccine v;

   char doPrevDose[25];

   char alphanumericCode[9];

} covidVaccineReg;

void generateAlphanumericCode(covidVaccineReg *cv);

int main(){

   covidVaccineReg cv[10];

   int i;

   for (i=0; i<10; i++){

       printf("\nUser %d\n------\n", i+1);

       //Entering First Name

       printf("\nEnter your First Name: ");

       scanf("%s", cv[i].firstName);

       //Entering Last Name

       printf("\nEnter your Last Name: ");

       scanf("%s", cv[i].lastName);

       //Entering Date of Birth

       printf("\nEnter your Date of Birth (mm/dd/yyyy): ");

       scanf("%s", cv[i].dob);

       //Entering Sex

       printf("\nEnter your Sex (Male/Female/Do not wish to identify): ");

       scanf("%s", cv[i].sex);

       //Entering Dose Number

       printf("\nEnter your Dose Number (1 or 2): ");

       scanf("%d", &cv[i].v.doseNumber);

       //Entering Date of Previous Dose

       printf("\nEnter Date of Previous Dose (mm/dd/yyyy): ");

       scanf("%s", cv[i].doPrevDose);

       //Entering Type of Vaccine

       printf("\nEnter Type of Vaccine (Pfizer, Moderna, Johnson&Johnsoh): ");

       scanf("%s", cv[i].v.vaccineType);

       //Entering Residential Zipcode

       printf("\nEnter Residential Zipcode: ");

       scanf("%d", &cv[i].v.zipCode);

       // Generating alphanumeric Code

       generateAlphanumericCode(&cv[i]);

   }

   //Display all user's information

   printf("\n\nDisplaying all user's information\n-------------------------------\n");

   for (i=0; i<10; i++)

   {

       printf("\nUser %d\n------\n",i+1);

       printf("First Name: %s\n", cv[i].firstName);

       printf("Last Name: %s\n", cv[i].lastName);

       printf("Date of Birth: %s\n", cv[i].dob);

       printf("Sex: %s\n", cv[i].sex);

       printf("Dose Number: %d\n", cv[i].v.doseNumber);

       printf("Date of Previous Dose: %s\n", cv[i].doPrevDose);

       printf("Type of Vaccine: %s\n", cv[i].v.vaccineType);

       printf("Residential Zipcode: %d\n", cv[i].v.zipCode);

       printf("Alphanumeric Code: %s\n", cv[i].alphanumericCode);

   }

   return 0;

}

// Function to generate an 8 letter alphanumeric code

void generateAlphanumericCode(covidVaccineReg *cv){

   char alphanum[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G',

                   'H', 'I', 'J', 'K', 'L', 'M', 'N',

                   'O', 'P', 'Q', 'R', 'S', 'T', 'U',

                   'V', 'W', 'X', 'Y', 'Z',

                   '0', '1', '2', '3',

What is C programming?
C programming is a powerful and versatile programming language. It is a structured, high-level language that is used to create software applications. It is one of the most widely used languages in the world, as it is used in a variety of applications, from operating systems to embedded systems. C programming is a compiled language, meaning that it is written in a language that is then compiled into executable code. C programming is a low-level language, meaning that it is close to the system’s hardware and can access and control memory more efficiently than higher-level languages. C programming has a wide range of features, such as structured programming, object-oriented programming, data structures, and multi-threaded programming. It is also a great language for learning programming fundamentals. C programming is also highly portable, meaning that it is easy to move programs written in C between different operating systems and hardware platforms.

To learn more about C programming
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