Increment and decrement

[aki1594]

#include<stdio.h>
main()
{
int i=5;
printf("%d %d %d %d %d \n",i,i++,++i,i++,i);
}

In the TurboC compiler the output is
8 7 7 5 5
In the GCC compiler the output is
8 7 8 5 8

why the difference?

[hpmachining]

What you have is undefined behavior. The order in which function arguments are evaluated is unspecified in the standard, so how they are evaluated is compiler specific. Here is a link to Kernigan & Ritchie. See chapter 2.12, (specifically page 49) for an example similar to yours.