Q21. Write a C++ program to accept a number and if it is less than 50 and greater than 20 than print its square value.
#include<iostream.h> //standard input/output header file
#include<conio.h> //for clrscr()
clrscr(); //for clearing the screen
cout<<“\n Enter a number: “;
a<50&&a>20? cout<<“\n The square of number is “<<a*a<<“.” : cout<<“\n The number is “<<a<<“.”;
getch(); //holds the screen until any key is pressed
return 0; //makes main() finish
Enter a number: 45
The square of number is 2025.
Enter a number: 78
The number is 78.