Could someone explain me the logic??

[Sarath88]

main()
{
int a;
int k;
a=1;

for(k=0;k<10;k+ +)
{
printf("%d %d %d\n",++a,a++,+ +a);
}
}

Output is:

3 2 2
6 5 5.....

[newb16]

was asked yesterday and some more times before

[Oralloy]

@Sarath88,

The program ventures into the realm of undefined behaviour. It auto-increment and/or auto-decrement of the same memory multiple times within an expression.