I don't understand

hi.. this is my code:

Code:

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#include <iostream>
using namespace std;
int main()
{
   
    float a,b;
    char ex[]="n";
    do {
    cout<<"a=: " ; cin>>a;
    cout<<"b=: " ; cin>>b;
    cout<<"a/b= "<<a/b<<endl<<endl;
    cout<<"Stop? (y/n): "; cin>>ex;
    if (ex=="Y"||"y"){
    return 0;
    }
    }while((ex!="y")||(ex!="Y"));
   
}

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I don't know what's wrong with this program..even I press n or N it exit..I want to repeat if I press n or N.
can someone help me?

Quote:

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Originally Posted by AndreyS10

..even I press n or N it exit..I want to repeat if I press n or N.
can someone help me?

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Because this:

Code:

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if (ex=="Y"||"y"){

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Means:

if ex=="Y" is true
OR
if "y" is true

"y" is not zero, so the second condition is always true.

Also, " and ' are different. "Y" indicates a string literal, and ex is a c-string, but you cannot compare one such string to another with ==. You can, however, compare single char values, but a char value is single quoted.

So perhaps you want something more like:

Code:

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char ex='n';  // single char instead of a c-string
if (ex == 'Y' || ex == 'y'){  // single quotes around char values

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thank you..I works..
I'm new to programming so I still learn.