Thread: The '++' operator. !!! HELP !!!

Hi friends,
I am new to the C language and need some help with the increment operator '++'. Please check the following code snippet:

Code:

int i,a;
i=0;
a = i++ + i++;
printf("\n i++ + i++ = %d",a);
i=0;
printf("\n i++ + i++ = %d",i++ + i++);

The output :

Code:

i++ + i++ = 0
i++ + i++ = 1

I do not understand the difference in the output of the operator. Please help.
Thank you.