Question

Imran/anyone else familiar with C++, how would I do this?

Answer 1

here

Answer 2

im trying to use a while loop.. like
while ( month !=1 || month != 2, etc..) ask for a new month

Answer 3

for (int i = 0 ; i ++;i<12)
{
if(month = i )
{ break;}
else { flag =1;}
}
if flag==1
then cout <<"enter valid month";
else {exit;}

Answer 4

I can't use for loops yet, I can only use while. and if/else

Answer 5

actually the assignment says:
If the value of month is between 0 and 12, output: A valid month has been
entered. Otherwise, ask and allow the user to enter a new value for month.

Answer 6

I tried this:
#include<iostream>

using namespace std;

int main()
{
int month;
cout << "Please enter a month (1-12): ";
cin >> month;
while (month != 1 || month != 2 || month != 3
|| month != 4 || month != 5 || month != 6
|| month != 7 || month != 8 || month != 9
|| month != 10 || month != 11 || month != 12)
{
cout << "An incorrect month has been entered, try again: ";
cin >> month;
if (month = 1 || month = 2 || month = 3
|| month = 4 || month = 5 || month = 6
|| month = 7 || month = 8 || month = 9
|| month = 10 || month = 11 || month = 12)
cout << "A correct month has been entered.";
break;
}
system("pause");
return 0;
}

Answer 7

But I'm getting some really weird error...

Answer 8

In this line:
|| month = 10 || month = 11 || month = 12)
non-Ivalue assignment error

Answer 9

declare flag out of the while loop ..

Answer 10

int flag =0;
int i = 0;
int month ;
while (flag == 0 )
{
cout<<"Enter Month ";
cin>>month;
i =0 ;
while ( i < 12)
{
if (month == i)
{
flag =1;
break;
}
else {flag = 0;}
i ++;
}

if (flag== 1)
{cout<<"Month is Correct";
exit;
}else
{cout<<"Month In correct";
}
}

Answer 11

It should do it only while and if statement

Answer 12

Bahrom is it right ? It should be

Answer 13

sorry I was away.. I can't use flags..

Answer 14

you can't use flags but they are just integers

Answer 15

wait..

Answer 16

oh lol i see, why did u call it flag? I could've also just called it month etc.. let me see what's going on..

Answer 17

ok

Answer 18

nope the conditions need to be refined..

Answer 19

This one:
i < 12
If i enter say 1.1 it's still accepting

Answer 20

because it's takin the integer part, 1

Answer 21

but why would someone enter 1.1 for a month

Answer 22

lol I dunno but I have to work that out too, since I already had one that would not accept anything other than 0<x<12

Answer 23

Ok but your program the one you posted is fine too why is it showing error

Answer 24

Oh i meant it's not giving me errors, not that one, but it is not doing what it's supposed to do

Answer 25

and if i enter 1.1 there then it would also accept it

Answer 26

yea

Answer 27

what if we take float

Answer 28

no i was thinking reject everything but integers

Answer 29

Oh and I also tried something.. that one rejects everything other than the right numbers but it won't ask them to try again

Answer 30

even with mine one ...(actually it's my father's computer and i don't have compiler)

Answer 31

ah well let me take a break from this i got a headache i will come back again later and figure this out, i did that with everything before

Answer 32

this is simple.
int month;
assert month > 0;
while(month>12)
{
cout<<"enter a valid month";
cin>> month;
}
cout<<"A valid month has been entered";

Answer 33

what is assert? I don't think im allowed to use anything other than if/else/while, because we didn't use assert yet

Answer 34

*we didn't learn assert yet

Answer 35

okay, then change it to:


unsigned int month;
cin>>month;
if (month=0)
{
cout<<"enter a valid month";
}
while(month>12)
{
cout<<"enter a valid month";
cin>> month;
}
cout<<"A valid month has been entered";

Answer 36

2 thoughts:
1) a single = as in A=B is an assignment, while == is a test for equality. Perhaps this is part of your problem?
2) Try to keep the logic simple. For example, using the ideas already proposed

int valid= 0;

while(valid==0)
{ input month;
if month valid (insert your test here) valid=1; else complain to user
}
The idea is it will loop until (if!) the user puts in a valid number.