Question

C Program Assignment:

2-Add comments to your program to full document it by describing the most important processes.

3-Your variables names should be very friendly. This means that the names should have meaning related to what they are storing. Example: Instead of naming the variable that stores the hours worked for an employee in a variable called ‘x’ you should name it HoursWorked.

5-Submit your .c program (note that I only need your source code and not all files that are normally part of your project folder)

6-Your program MUST be very modular: use of different sections for different processes (i.e. declarations, input, calculations, output) and functions are covered.

7-Your output MUST friendly (using labels for all info accordingly) and do display all input and calculated fields.

8-you must use arrays and pointers to arrays each time you need to store a value in an array, retrieve a value from an array or process any array in any way including passing a reference of an array to a function or returning a reference to an array from a function.

Problem’s specification: The FEPA (Fictious Environmental Protection Agency), is tasking you for coding an application that monitors the ph of a series of lakes in Florida.

All data are to be stored in 3 arrays with 100 empty entries.

Your input consists of the following: -the ID of the lake (coded as 111, 222, 333, ….etc) -the ph of the lake (acidity value) (value between 0 and 14..must be validated) -the temperature of the lake for this time of the year.

What to do? -Code a menu in a separate function: MENU --------- -1-Add a lake -2-Display a lake -3-Quit -If user select 1 from the MENU, call a function you must code that prompts the user to enter information for a given lake.

-If user select 2 from the MENU, call a function that search for a lake in the array bi ID and if found call a function that determines the acidity of the lake and store the related value in a separate array (to be declared and in parallel with the other arrays) then,

-Call a function that displays a report about this lake (ID, ph, temp, and acidity) A lake is deemed acidic if its ph is between 0 and 7, neutral if it is 7, and basic if it is between

-code a function that print a report showing: Lake name, lake ph, lake temperature, and the status of the lake (acidic, neutral, or basic)

-Code a function/routine that after the user complete the input of all available lakes, displays the lake info. That is the most acidic. Also, display how many lakes the user input for this study.

-Required: your program must prompt the user to input a new lake or quit and must validate the user answer.

Answer 1

#pragma warning(disable : 4996)
# include <stdio.h>

// function prototypes
//***********************************************
// shows menu option to user for selection
//***********************************************
void displayMenu();

//***********************************************
// ask user for selecting a opton from 1 to 3
// coontinue asking user untill a valid
// option is selected
// returns the selected option
//***********************************************
int getUserOption();

//***********************************************
// takes input from user and arrays and integer
// as size of arrays as parameters to store data
// adds a lake information from user and
// stores it to given arrays
//***********************************************
void addALake(int* id, float* ph, int* temprature, int size);

//***********************************************
// takes lake data as input parameters and
// prints lake report
//***********************************************
void printLakeReport(int id, float ph, int temprature);

//***********************************************
// takes arrays with lake data and integer as
// size of arrays as parameters
// prints total number of lacks and most acidic
// lack data from the arrays
//***********************************************
void displayMostAcidicLake(int* id, float* ph, int* temprature, int size);

// main function to run program
int main() {
   // create arrays to store data
   // maximum entries is 100
   int MAX_ENTRY = 100;
   int* lake_id = (int*)malloc(sizeof(int) * MAX_ENTRY);
   float* lake_ph = (float*)malloc(sizeof(float) * MAX_ENTRY);
   int* lake_temprature = (int*)malloc(sizeof(int) * MAX_ENTRY);
   int number_of_entries = 0;

   // loop till user enters quit or number of entriess are at maximum
   while (number_of_entries < MAX_ENTRY) {
       // show menu for user interaction
       displayMenu();
       // get user option
       int option = getUserOption();
       // check user option
       if (option == 1) {
           addALake(lake_id, lake_ph, lake_temprature, number_of_entries);
           number_of_entries++;
       }
       else if (option == 2) {
           // ask user for lack id to search
           printf("Enter lake ID: ");
           int id;
           scanf("%d", &id);
           int lake_index = -1; // index of lake with given id
           // check if lake with given id exist
           for (int i = 0; i < number_of_entries; i++) {
               if (lake_id[i] == id) {
                   lake_index = i;
               }
           }
           // print lake report if found
           if (lake_index > -1) {
               printLakeReport(lake_id[lake_index], lake_ph[lake_index], lake_temprature[lake_index]);
           }
           else {
               printf("Lake with given ID does not exist in data!\n");
           }
       }
       else {
           // user selected quit
           break;
       }
   }
   // print most acidic lake
   displayMostAcidicLake(lake_id, lake_ph, lake_temprature, number_of_entries);
   // free memory
   free(lake_id);
   free(lake_ph);
   free(lake_temprature);

   return 0;
}

// function declaration

void displayMenu() {
   printf("\nMENU\n---------\n");
   printf("1) Add a lake\n");
   printf("2) Display a lake\n");
   printf("3) Quit\n");
}

int getUserOption() {
   printf("Select: ");
   int option;
   scanf("%d", &option);
   // check for valid option
   while (option < 1 || option > 3) {
       printf("Invalid opton!\n");
       printf("Enter integer from 1 to 3: ");
       scanf("%d", &option);
   }
   return option;
}

void addALake(int* id, float* ph, int* temprature, int size) {
   // take input from user
   printf("Enter id of lack: ");
   int lack_id;
   scanf("%d", &lack_id);
   // validate user input
   // check if lack with given id already exist
   for (int i = 0; i < size; i++) {
       if (id[i] == lack_id) {
           // print error
           printf("Lake with given ID already exist in database!\n");
           return;
       }
   }
   // take ph value for the lack
   printf("Enter ph value for the lack: ");
   float lack_ph;
   scanf("%f", &lack_ph);
   // validate user input
   if (lack_ph < 0 || lack_ph > 14) {
       printf("Invalid ph value!\n");
       return;
   }
   // take temprature of the lake
   printf("Enter temprature of the lack(in celcius): ");
   int lake_temprature;
   scanf("%d", &lake_temprature);
   // enter lake data into arrays
   id[size] = lack_id;
   ph[size] = lack_ph;
   temprature[size] = lake_temprature;
}

void printLakeReport(int id, float ph, int temprature) {
   printf("\nLake ID: %d\n", id);
   printf("Lake pH: %.1f\n", ph);
   printf("Lake Temprature: %d celcius\n", temprature);
   printf("Lake Status: ");
   // print lake status based on ph value
   if (ph == 7) {
       printf("neutral\n");
   }
   else if (ph < 7) {
       printf("acidic\n");
   }
   else {
       printf("basic\n");
   }
}

void displayMostAcidicLake(int* id, float* ph, int* temprature, int size) {
   // print total number of lake
   printf("\nTotal lake entered: %d\n", size);
   // get index of most acidic lake
   int index = 0;
   // most acidic lake have lowest ph
   int lowest_ph = 14; // lowest ph found in array, initialize with highest ph value
   for (int i = 0; i < size; i++) {
       if (lowest_ph > ph[i]) {
           // reset index
           index = i;
           // reset lowest ph
           lowest_ph = ph[i];
       }
   }
   // display data for most acidic lake
   printf("Most acidic Lake: \n");
   printLakeReport(id[index], ph[index], temprature[index]);
}

let me know if you have any problem or doubt. thank you.