Incrementation and decrementation in C

[pamuditha]

#include<stdio.h>
int main(){
int a=5;
printf("%d %d %d",a++,a++,++a);
return 0;
}

i tried this code in Visual C++ 2008 and i have get 7 6 8 as output.
can anyone describe the fact around the output is'nt being 5,6,8.

[lokeshm]

Please do not try to modify the values of your variables more than once in a single function call argument-list because the order of evaluation of operands of individual operators and sub-expressions of individual expressions, and the order in which side effects take place, is unspecified.

Please try to read more on these topics "Sequence Points" and "Undefined Behavior"