While statement not working?

Question

#include 
#include 
using namespace std;
int main()
{
    int number;
    float cost;
    char beverage;

    bool validBeverage;

    cou         


        

Answer 1

Change

while(beverage!='e'||beverage!='E'); // Condition becomes true always 

to

while(beverage!='e'&& beverage!='E');  

And similarly replace all || by && in first while loop conditional expression

while(beverage!='A' && beverage!='B' &&beverage!='C'&& beverage!='D' && beverage!='E' && beverage!='a' && beverage!='b' && beverage!='c' &&
     beverage!='d' && beverage!='e')

Answer 2

Take this condition as an example, the same problem is in others as well.

while (beverage!='e'||beverage!='E');

A character is either not equal to 'e', or it is equal to 'e', in which case it's not equal to 'E', so the condition is always true.

What you want is logical and.