Output C++

[Naman29]

Output of the program :
//INPUT VALUE OF A =0

int a,b=3;
cin>>a;
if(a)
b=a++ -1;
cout<<a<<endl;
cout<<b<<endl;

ANSWER IS :
a=0
b=3

please tell me how it came. i'm unable to get the output

[EwCjE3v7]

Nothing is wrong with the program

Presuming you give it the input 0, this happens

int a,b=3; // b is initialised to the value 3
cin>>a;   // we get input in to a, in this case its 0
if(a) // a == 0
  b=a++ -1; // this does not execute
cout<<a<<endl; // print out the value of a, 0
cout<<b<<endl; // print out the value of b, 3 

If you would like the if to execute when the value is 0, you can do this

int a,b=3;
cin>>a;
if(a == 0)
  b=a++ -1;
cout<<a<<endl;
cout<<b<<endl;

[Naman29]

thanks a lot :)
appreciate it ..it helps