How does the increment operator work in an if statement?

Question

    #include 

    int main()
    {
        int x = 0;

        if (x++)
            printf(\"true\\n\");
        else if (x == 1)
            printf(         


        

Answer 1

Post increment means that it returns the current value (in this case for the purpose of the if) and increments it afterwards. It is equivalent to

if(x) {
  x++;
  // ...
} else {
  x++;
  // ...
}