question about operator priority

[Yongming wei <weiyongming2001 at yahoo dot com dot cn>]

hi all,

This is a quesiton about priority of operator in c, I
have a simple program:

#include <stdio.h>

main()
{
        int i = 1;
        i = i + ++i;
        printf("%d\n",i);
}

the result is 4 in my redhat 7.3, I think the compiler
first get the result of ++i, because ++ have high
priority than +, so the result is right.

However, after above code is changed to:

#include <stdio.h>

main()
{
        int i = 1;
        i = i + i + ++i;
        printf("%d\n",i);
}

The result is still 4. If compiler think ++ has higher
priority, it should do it in blow sequence:

++i; /* the value of i should be 2 now */
i + i +i; /* the result should be 6 */


but this time the result is not my expected.

Is this problem is because my wrong concept about c or
it is a bug of c compiler?


Thanks,

Yongming


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