AHPA #11: Changing Grades * * Create a C function (switcher) that will receive a pointer to the finalExams array, using only pointers look for D scores and boost  them to C scores. (ouput should be same as picture) #include <stdio.h> void switcher() {  } int main(void) {    int finalExams[] = {90,82,65,79,67,82,94,64,88,78,92,61,96,83,74};    return 0;}

This problem comes from Introduction to C++ Programming and Data Structures, 4th Edition (invalid_argument )Listing 6.18 gives the hex2Dec(const string & hexString) function that returns a decimal number from a hex string. Implement the hex2Dec function to throw a invalid_argument exception if the string is not a hex string.Write a test program that prompts the user to enter a hex number as a string and display the number in decimal. If the function throws an exception, display "Not a hex number".

C++ 13.10 Write a function SwapArrayEnds() that swaps the first and last elements of the function's array parameter. Ex: sortArray = {10, 20, 30, 40} becomes {40, 20, 30, 10}. #include <iostream>using namespace std; /* Your solution goes here  */ int main() {   const int SORT_ARR_SIZE = 4;   int sortArray[SORT_ARR_SIZE];   int i;   int userNum;    for (i = 0; i < SORT_ARR_SIZE; ++i) {      cin >> userNum;      sortArray[i] = userNum;   }    SwapArrayEnds(sortArray, SORT_ARR_SIZE);    for (i = 0; i < SORT_ARR_SIZE; ++i) {      cout <<  sortArray[i] << " ";   }   cout << endl;    return 0;}

C++ dont copy code

C++

1. Replace the (????) with relevant code to make th eprogram function. Details about the code are given below:(Java as been used) a) This program creates a reference to a file in main() and passes the reference to countWords() countWords(), not main(), reads the file and displays Total lines Total words Average words per line */   package finalexamtakehome1; import java.io.*; /**  *  * @author sweetkim  */ public class Finalexamtakehome1 { //     public static void countWords(????) {     int lineCount = 0;     int wordCount = 0;         while (????()) {         String line = input.nextLine();         lineCount++;         Scanner lineScan = new Scanner(line);         while (????()) {             String next = lineScan.next();             wordCount++;         }     }         double averageWords = (double) wordCount / lineCount;     System.out.println("Total lines = " + lineCount);     System.out.println("Total words = " + wordCount);     System.out.printf("Average words per line =…

see image for instructions starter code for Main.java   import java.util.*; public class Main {   public static boolean  checkParen(String s) {      //implement this method to return true if grouping symbols match       //each other, otherwise return false.       /* Type your code here. */   }}

6.24 C++ Define a function named SortVector that takes a vector of integers as a parameter. SortVector() modifies the vector parameter by sorting the elements in descending order (highest to lowest). Then write a main program that reads a list of integers from input, stores the integers (starting from the second integer) in a vector, calls SortVector(), and outputs the sorted vector. The first input integer indicates how many numbers are in the list. Ex: If the input is: 5 10 4 39 12 2 the output is: 39,12,10,4,2,

I need a better understading onn solving thi question?