c increment & decrement

[Nandadulal]

sir,

I am a new user of c language .plz. explain me the what will be the output of this code and why?

int i=1;
{
printf("%d%d%d% d",++i,i++,--i,i--);
}
actually I understand ++i or i++ but when using with 2 or 4 variables i am being confused.
plz. explain in details the output of this program.

[newb16]

It's undefined because several increments/decrements on i variable happens before the next sequence point. The generated code may change the value of 'i' after calculating all parameters' values, resulting in output 2101, or change it after each parameter value is calculated (2222, if they are evaluated left to right)

[donbock]

Wasn't this question already answered yesterday in your other post?