Since the infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was reported in China during December 2019, the coronavirus disease 2019 (COVID-19) has spread on a global scale, causing the World Health Organization (WHO) to issue a warning. While novel vaccines and drugs that target SARS-CoV-2 are under development, this review provides information on therapeutics which are under clinical trials or are proposed to antagonize SARS-CoV-2. Based on the information gained from the responses to other RNA coronaviruses, including the strains that cause severe acute respiratory syndrome (SARS)-coronaviruses and Middle East respiratory syndrome (MERS), drug repurposing might be a viable strategy. Since several antiviral therapies can inhibit viral replication cycles or relieve symptoms, mechanisms unique to RNA viruses will be important for the clinical development of antivirals against SARS-CoV-2. Given that several currently marketed drugs may be efficient therapeutic agents for severe COVID-19 cases, they may be beneficial for future viral pandemics and other infections caused by RNA viruses when standard treatments are unavailable. Keywords: COVID-19; coronavirus; infection; drug discovery; drug repositioning

Solution.cpp #include <graphics.h> // driver code int main() { // gm is Graphics mode which is a computer display // mode that generates image using pixels. // DETECT is a macro defined in "graphics.h" header file int gd = DETECT, gm; int left = 200, top = 20; int right = 430, bottom = 460; // initgraph initializes the graphics system // by loading a graphics driver from disk initgraph(&gd, &gm, ""); setcolor(WHITE); settextstyle(DEFAULT_FONT, HORIZ_DIR, 2); outtextxy(10, 20, (char*)"BC123456789"); setcolor(WHITE); setfillstyle(SOLID_FILL,WHITE); rectangle(left, top, right, bottom); bar(200,20,430,460); setcolor(LIGHTRED); setfillstyle(SOLID_FILL,LIGHTRED); circle(left+100,top+280,50); floodfill(left+100,top+280,LIGHTRED); setcolor(LIGHTGREEN); setfillstyle(SOLID_FILL,LIGHTGREEN); circle(left+160,top+340,30); floodfill(left+160,top+340,LIGHTGREEN); setcolor(LIGHTBLUE); line(left,top+280,right,bottom-20); setcolor(LIGHTGREEN); line(left,top+300,right,bottom); setcolor(LIGHTRED); line(left,top+320,right-30,bottom); getch(); // closegraph function closes the graphics // mode and deallocates all memory allocated // by graphics system . closegraph(); } Download Complete Solution

/* Implementation of stack using array */ #include <iostream> #include <conio.h> using namespace std; class Stack /* the Stack class */ { public: Stack() { size = 0; current = -1; } //constructor int pop() { return data[current--]; } // The pop function void push(int x) { data[++current] = x; //cout<<A[current]; } // The push function int top(){ return data[current]; } // The top function int isEmpty(){ return ( current == -1 ); } // Will return true when stack is empty int isFull(){ return ( current == size-1); } // Will return true when stack is full void setStackSize(int s){ size = s; data = new int[size]; } private: int object; // The data element int current; // Index of the array int size; // max size of the array int *data; // Array of 10 elements }; // Main method int main() { int t_books= 0, size = 0; int scount = 0, hcount=0, ocount=0; // For counting of book i.e software , hardware and other books. Stack stack; // creating a stack object cout<<"Set size of stack: "; cin>>size; stack.setStackSize(size); cout<<"How many Books you want to add into stack: "; cin>>t_books; int book; for(int i = 0; i < t_books; i++) { cout <<"\nEnter Book identity number that you want to insert into stack: "; cin>>book; if(!stack.isFull()) { // checking stack is full or not stack.push(book); // push the element at the top } else{ cout<<"\n Unable to insert "<<book<<". Stack is full, can't insert more"; break; } } // pop the elements at the stack int current = 0; for (int i = 0; i < t_books; i++) { if(!stack.isEmpty()) { // checking stack is empty or not current = stack.pop(); if(current % 8 == 0){ scount++; } else if(current % 5 == 0){ hcount++; } else { ocount++; } } else { cout <<"\nStack is empty, sorry can't pop more"; getch(); break; } } if(scount == 0 && hcount==0 && ocount==0){ cout<<"\nBooks not found\n"; } else { cout<<"\n\nTotal Software Book/Books = "<<scount; cout<<"\n\nTotal Hardware Book/Books = "<<hcount; cout<<"\n\nTotal Other Book/Books = "<<ocount; } getch(); }