Write a program to convert number in characters.

Given a number we have to convert them into character.

so what is character?

character are english letters like A,B,C,D . so we have to convert their numeric value to english alphabet.

for example-1 as one , 2 as two 3 as three.

Example:

input:18
output:one eight

input:23
output:two three

logic :

divide a number by 10 and get the result and map them with english alphabet.

#include <iostream>  
using namespace std;  
int main()  
{  
int num;  
cout<<"enter a number: "<<endl;    
cin>>num; 
int sum=0;
int rem=0;
while(num>0)    
{    
rem=num%10;    
sum=sum*10+rem;    
num=num/10;    
}    
num=sum;    
while(num>0)    
{    
    
rem=num%10;

switch(rem)    
{    
    
case 0:    
cout<<"zero ";  
break;   

case 1:    
cout<<"one ";    
break;    

case 2:    
cout<<"two ";    
break;

case 3:    
cout<<"three ";  
break;    

case 4:    
cout<<"four ";  
break; 

case 5:    
cout<<"five ";  
break;

case 6:    
cout<<"six ";   
break; 

case 7:  
cout<<"seven ";  
break;

case 8:    
cout<<"eight ";    
break;

case 9:    
cout<<"nine ";  
break; 

 
default:   

cout<<"number is not exist";    
break;    
}    
num=num/10;    
}    
}  

Output:

enter a number: 92
nine two 

Time Complexity: O(N)

Space Complexity:O(1)