how d=0 ?

Question

#include <stdio.h>
int main()
{
int a = 1;
int b = 1;
int c = a || --b;
int d = a-- && --b;
printf("a = %d, b = %d, c = %d, d = %d", a, b, c, d);
return 0;
}

// Here the output is a = 0, b = 0, c = 1, d = 0

Answer 1

Arun as after decrement the value of a and b is 0 so by doing AND operation it will too return 0 as AND will return true when both operand is true or 1 else every other conditions will return 0 like

a b output
0 0 0
0 1 0
1 0 0
1 1 1

so d return 0 as both the values of a and b is 0