Question

This is my test code

#include<iostream>
using namespace std;
int main() 
{
    uint8_t a;
    while(1)
    {
        cin>>a;
        if(a == 0) break;
        cout<<"Input is "<<a<<endl;
    }
}  

When I execute (with my inputs), this is what I get

1
Input is 1
2
Input is 2
12
Input is 1
Input is 2
0
Input is 0
3  
Input is 3

Problem1: It takes input 12 as two separate inputs

Problem2: Condition if a==0 doesn’t work

What might be the problems?

Answer 1

uint8_t is a typedef for an unsigned char. This means that one character will be read from cin.

When "0" is read it is actually the ascii value of the character '0' commonly 48, which is not zero hence the equality check fails.