Discuss a C language problem

darkperi

Finally, there is such a thing I know very well, but when I answered, I found that there were so many big cows in front, so many steps late

djxzzz

Testing is best in specific operating environments

jadekylin

This question is only related to the grammar rules of the C language, and has nothing to do with how to implement it!
No matter what c compiler, the result is the same. Otherwise it cannot be called "language"
For: suppose i = 2
printf ("% d,% d", i, i ++); // This case is displayed as: 3,2
printf ("% d,% d", i, ++ i); // This case is displayed as: 3,3
printf ("% d,% d", i ++, i); // This case is displayed as: 2,3
printf ("% d,% d", ++ i, i); // This case is displayed as: 3,3
The results of the first and second sentences are abnormal. It is estimated that you read the wrong result!
printf ("% d,% d", i, i ++); // should show as: 2,2
printf ("% d,% d", i, ++ i); // should show as: 2,3
If it is not that you read it wrong, then you have a problem with the c compiler, please give up

Although C is very flexible, it is not flexible enough to change even the grammar rules!

It is really admirable for the "five bodies to cast their grounds" that the "experts" above have to explain "wrong".

mao199413

++ is behind, i ++ value is i, i then add 1

yy偶不会

The master of LS said inexplicably, C did not define the order of expression evaluation, of course, the result should be compiler-related ...

mars1004

Pushing the stack from right to left is not the same as counting from right to left! !! You still don't need to do anything. Read more books. The "C A Reference Manual" is recommended.

ch0bits

Do you have to use it this way?
Try to avoid such problems.
Research this,
I think,

not worth

yangjie179

Support upstairs and upstairs

bebe0314

i = 0

printf ("% d,% d", i, i ++); // 1,0
printf ("% d,% d", i, ++ i); // 1,1
printf ("% d,% d", i ++, i); // 0,0
printf ("% d,% d", ++ i, i); // 1,0

jyybbb

This has to do with the compiler! Is the result different for different compilers? . . c Pressure parameters are from right to left. . The remaining high-level languages ​​are pressed from left to right!