Question

C++

Write a program using switch-case-break that will take an input number as for example 2 and based on switch it will provide various powers of 2.

Answer 1

#include<iostream>
using namespace std;
int main()
{
   int n=0;
   //takes input number and provides various powers of 2
   cout<<"Enter: 1:for 2^1\n2:for 2^2\n3:for 2^3\n4:for 2^4\n5:for 2^5:\nEnter your choice:";
   cin>>n;
   // switch-case-break
   switch(n){
       case 1:
           cout<<2<<endl;
           break;
       case 2:
           cout<<4<<endl;
           break;
       case 3:
           cout<<8<<endl;
           break;
       case 4:
           cout<<16<<endl;
           break;
       case 5:
           cout<<32<<endl;
           break;
       default:
           cout<<"Invalid choice\n";
      
   }
   return 0;
}

output:

Enter: 1:for 2^1
2:for 2^2
3:for 2^3
4:for 2^4
5:for 2^5:
Enter your choice:3
8

Process exited normally.
Press any key to continue . . .