How is the output calculated for this code?

Question

int a = 10, b = 20;
int c= b/a? a:b;
printf("%d", c);

//Please help that how it is calculated//

Answer 1

It's ternary operator.
Question? answer1:answer2

So, your code should be like this
int c = b/a? a:b;

For a true question, it evaluates answer1 and returns its value; otherwise, it evaluates answer2 and returns its value.
Here, 20/10 is 2.
So, it's a true statement because any number evaluates true except zero.
That's why output is 10 which is a.

Answer 2

Syntax error

Run it in code Playground and find out yourself