Manually trace the following code to analyze how it works #include using namespace std; int main() {     int n = 5;     for (int row = 0; row < n; row++) {           for (int col = 0; col < n; col++) {                  cout << "*";        }         cout << endl; } } Based on the above s SquareCode, generate a code fragment “firstTriangle” in your main()  that reads in an integer n and displays the following triangle assuming n=5. The only couts you may use are cout <<“*” and cout << endl; Hint: write out a table showing for each row, how may columns you will need to display. * ** *** **** *****

#include <bits/stdc++.h>using namespace std;int main() { double matrix[4][3]={{2.5,3.2,6.0},{5.5, 7.5, 12.6},{11.25, 16.85, 13.45},{8.75, 35.65, 19.45}}; cout<<"Input no in first row of matrix"<<endl; for(int i=0;i<3;i++){     double t;     cin>>t;     matrix[0][i]=t; } cout<<"Contents of the last column in matrix"<<endl; for(int i=0;i<4;i++){     cout<<matrix[i][2]<<" "; } cout<<"Content of first row and last column element in matrix is: "<<matrix[0][3]<<endl; matrix[3][2]=13.6; cout<<"Updated matrix is :"<<endl; for(int i=0;i<4;i++){     for(int j=0;j<3;j++){         cout<<matrix[i][j]<<" ";     }cout<<endl; } return 0;}   Please explain this code

#include <stdio.h>   int arrC[10] = {0}; int bSearch(int arr[], int l, int h, int key);   int *joinArray(int arrA[], int arrB[]) {     int j = 0;     if ((arrB[0] + arrB[4]) % 5 == 0)     {         arrB[0] = 0;         arrB[4] = 0;     }       for (int i = 0; i < 5; i++)     {         arrC[j++] = arrA[i];           if (arrB[i] == 0 || (bSearch(arrA, 0, 5, arrB[i]) != -1))         {             continue;         }         else             arrC[j++] = arrB[i];     }       for (int i = 0; i < j; i++)     {         int temp;         for (int k = i + 1; k < j; k++)         {             if (arrC[i] > arrC[k])             {                 temp = arrC[i];                 arrC[i] = arrC[k];                 arrC[k] = temp;             }         }     }     for (int i = 0; i < j; i++)     {         printf("%d ", arrC[i]);     }     return arrC; }   int bSearch(int arr[], int l, int h, int key) {     if (h >= l)     {         int mid = l + (h - l) / 2;           if…

#include <bits/stdc++.h> using namespace std;   struct Employee {     string firstName;     string lastName;     int numOfHours;     float hourlyRate;     char major[2];     float amount;     Employee* next; }; void printRecord(Employee* e) {     cout << left << setw(10) << e->lastName << setw(10) << e->firstName << setw(12)         << e->numOfHours << setw(12) << e->hourlyRate << setw(10) << e->amount         << setw(9) << e->major[0]<< setw(7) << e->major[1]<<endl; }   void appendNode(Employee*& head, Employee* newNode) {     if (head == nullptr) {         head = newNode;     } else {         Employee* current = head;         while (current->next != nullptr) {             current = current->next;         }         current->next = newNode;     } }       void displayLinkedList(Employee* head) {     Employee* current = head; if(current!=nullptr){   cout…