Assembly language programming vs Other programming languages

[ChrisVer]

Edit: Note that is is considered bad practice to initialize an int with a double value.

hmm yeh, I had started it double, but then it complained with the usage of << . I changed it to integer but I forgot to remove the .0 ...

Hm, so that means the assembler code would be something like:
movl $0x6e , -0x4 (%rbp)
(sum is registered in 0x4 and moves 110 in it)
without a for loop?
Does that happen because the compiler runs the code and gets the result before producing the output?

 

[SlowThinker]

without a for loop?
Does that happen because the compiler runs the code and gets the result before producing the output?

It doesn't really run the code, but it optimizes it.

int chrisver()

{

int sum = 0;
for(int i=1; i<=10; i++)

{

sum+= 2*i;​

}​

return sum;​

0FB94090 mov eax,6Eh

}​

0FB94095 ret

 

[glappkaeft]

Does that happen because the compiler runs the code and gets the result before producing the output?

Since it doesn't really run the code it is usually said that the compiler evaluates the code at compile time. If you are interested in these things the compiler optimization section on wikipedia is a pretty good place to start. For instance constant folding is here: https://en.wikipedia.org/wiki/Constant_folding

Added: If you want to see what the compiler does with your code in a real world scenario you need to make sure the number of times the for-loop is repeated is not known at compile time, e.g. depends on user keyboard input, data from a file or similar.