[Courses] [C] Chapter 4d

[Laura Bowser]

In this case, ++x and x++ are the same.
They differ when you use them for things like arrays
 int array[5] = {1,2,3,4,5};
int x = 0;
 printf("++x = %d\n",array[++x]);  /* prints 2 */

but, if instead you did
 printf("x++ = %d\n", array[x++]);  /* prints 1 */

in the first case, X was incremented *before* it was used, so array[1] would 
be printed.  In the second case, x was incremented *after* it was used, so 
array[0] would be printed.

Laura


> ------------------Start program--------------------
> #include <stdio.h>
>
> int main(void) {
>         int x = 1;
>
>         printf("%d\n", x);
>
>         x++;
>         printf(%d\n", x);
>
>         x = 1;
>         ++x;
>         printf("%d\n", x);
> }
> -----------End Program-------------
>
> The results:
> 1
> 2
> 2
>
> So, x++ and ++x are the same.
>
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