Question

C++

function to a string into enum

function to a enum into a string

check valid / loop ( asking a couple of times until answer invaild)

For example

Enum Fruit ( APPLE, STRAWBERRY, BLUEBERRY, BLACKBERRY)

output should be

what is your favorit fruit? : strawberry

you will have STRAWBERRY.

what is your favorite fruite : peach

invaild

TIA

Answer 1

code:

#include <iostream>
#include <string>
#include<stdio.h>
#include <cstdlib>
using namespace std;
enum Fruit {APPLE,STRAWBERRY, BLUEBERRY, BLACKBERRY}; //declaration of enum

Fruit val(const std::string& s) //function to convert string into ennum
{
if(s=="APPLE"){
       return APPLE;
   }
else if(s=="STRAWBERRY"){ //checking string and returning enum value
       return STRAWBERRY;
   }
else if(s=="BLUEBERRY"){
       return BLUEBERRY;
   }
   else if(s=="BLACKBERRY"){
       return BLACKBERRY;
   }
   else{
       cout<<"Invalid";
   }
}
Fruit con(Fruit v){                //function to convert enum into string
   switch(v){
       case APPLE:
           cout<<"Apple";
       break;
       case STRAWBERRY:
           cout<<"STRAWBERRY";   
       break;
       case BLUEBERRY:               //checking enum to send string value
           cout<<"BLUEBERRY";
       break;
       case BLACKBERRY:
           cout<<"BLACKBERRY";
       break;
       default:
           cout<<"No such fruit";
       break;                       //break statement to stop condition
   }
}

int main()
{
string mystring;    //string declaration
Fruit t;         //creating object of fruit
t=APPLE;
con(t);        //passing enum value to con function
cout<<"\n";
    do{   
               cout<<"What is your favourite fruit:";
           cin >> mystring;
           Fruit f = val(mystring); //passing string value to convert to enum
   switch (f) {
  
   case APPLE:
   cout<<"You will have APPLE"<<"\n";
   break;
   case STRAWBERRY:
               cout<<"You will have STRAWBERRY"<<"\n";
   break;
   case BLUEBERRY:
               cout<<"You will have BLUEBERRY"<<"\n";
   break;
   case BLACKBERRY:
               cout<<"You will have BLACKBERRY"<<"\n";
   break;
   default:
               exit(0); //to exit out of console
           break;
   }
   }   while(true);

return 0;
}

output:

code screenshot: