enum

**rodrigorules** · 05-17-2006

i get a error that says "use of enum "Days" without previous declaration" but i think i declared it, i think..
here my code , im new still btw

Code:

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    enum Days (sunday=1,monday,tuesday,wednesday,thursday,friday,saturday);
    Days off;
    cout <<"what day do you want off?(1-7)"<<endl;
    cin>>off;
    if(off == monday)
           {
           cout<<"Good choice monday is";
           }
    else
           {
                 cout <<off<<" is a good choice to";    
           }
                 getch();
}

kthanks

**dwks** · 05-17-2006

Code:

user@0[~]$ g++ -W -Wall -ansi -pedantic -O2 -o t t.c
t.c:2:19: conio.h: No such file or directory
t.c: In function `int main()':
t.c:6: error: use of enum `Days' without previous declaration
t.c:6: error: `sunday' undeclared (first use this function)
t.c:6: error: (Each undeclared identifier is reported only once for each
   function it appears in.)
t.c:6: error: `monday' undeclared (first use this function)
t.c:6: error: `tuesday' undeclared (first use this function)
t.c:6: error: `wednesday' undeclared (first use this function)
t.c:6: error: `thursday' undeclared (first use this function)
t.c:6: error: `friday' undeclared (first use this function)
t.c:6: error: `saturday' undeclared (first use this function)
t.c:7: error: `Days' undeclared (first use this function)
t.c:7: error: parse error before `;' token
t.c:9: error: `off' undeclared (first use this function)
t.c:18: error: `getch' undeclared (first use this function)
user@0[~]$

One of your problems is this:

Code:

enum Days (sunday=1,monday,tuesday,wednesday,thursday,friday  ,saturday);

You used () instead of {}.

When you cin>>an enum, the user has to enter an integer, not "saturday" as you might expect.

**rodrigorules** · 05-17-2006

yes that worked, i didnt notice i typed that in..
but now i just notice that i get error on the line that says

Code:

cin>>off;

any idea?
btw my intent is to enter a number that corresponds with the day.

**jverkoey** · 05-17-2006

I'm assuming you're getting an error saying that it's an invalid type. To input a value you'll have to get the input as an int and then set your enum from there:

Code:

int input;
cin >> input;

**rodrigorules** · 05-17-2006

Originally Posted by jverkoey

I'm assuming you're getting an error saying that it's an invalid type. To input a value you'll have to typecast that value to an int.

Code:

cin >> (int)off;

didnt work, but u gave me the idea of what i had to do,,here the correct code incase anyone searchs enum

Code:

#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
    enum Days {sunday=1,monday,tuesday,wednesday,thursday,friday,saturday};
    Days off;
    int x;
    cout <<"what day do you want off?(1-7)"<<endl;
    cin>>x;
    off = Days(x);
    if(off == monday)
           {
           cout<<"Good choice monday is";
           }
    else
           {
                 cout <<off<<" is a good choice to";    
           }
                 getch();
}

**jverkoey** · 05-17-2006

*nods* That's exactly what you need to do. Be aware that it's possible for the user to type non-enumerated values because you're typecasting the int.

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