why i cant instantiate objects inside a switch-case block

Question

my code has 3 classes n_hexa,n_octa,n_bin. The code is here

switch(choice)
{
case 1: cin>>n; 
 n_hexa nx(n);
        break;
case 2: cin>>n; 
 n_octa          


        

Answer 1

Try declaring the variables above the switch command:

n_hexa nx;
n_octa no;
n_bin nb;
switch(choice) {
    case 1:
        cin>>n;
        nx(n);
        break;
...