Solve a problem?

[biggiepk]

Hi guys. 

Can somebody please help me with this? I need to do this but donno how. If somebody can do it and post it that would be great! 

It just need to be write down on paper, without programs. 

 

 

THANKS 

[Pugs501]

2 = 1 + 0 - 3 + 4

 

[Key]

x = $s2

r = $s1

t = $s0

g = $s3

f = $s4

 

Jesus @biggiepk it's just Trial and Error

[biggiepk]

I never saw this in my life, first time so.. Is this ok? 

 

add$s5, $s1,$s2

add$s6,$s3,$s4

sub$s0,$s5,$s6 

[fizzlesticks]

2 = 1 + 0 - 3 + 4

 

[Key]

x = $s2

r = $s1

t = $s0

g = $s3

f = $s4

 

Jesus @biggiepk it's just Trial and Error

Can't tell if srs.

[biggiepk]

Sorry. Thanks. 

[Pugs501]

Can somebody plz help, i'm really new into this.. is this ok what i wrote? or.. 

what are you trying to achieve?

[biggiepk]

Thanks mate. 

[mathijs727]

According to this C++ reference + and - are right-to-left associative and have the same precendence:

http://en.cppreference.com/w/cpp/language/operator_precedence

 

So you would read it as:

x = (r + (t - (g + f)))

 

This will lead to something like this:

add $s5 $s3 $s4

substract $s5 $s2 $s5

add $s0 $s0 $s5

 

The exact operations and op codes are dependent on the specific Instruction Set Architecture you're compiling too.

[madknight3]

According to this C++ reference + and - are right-to-left associative and have the same precendence:

http://en.cppreference.com/w/cpp/language/operator_precedence

 

So you would read it as:

x = (r + (t - (g + f)))

 

This is incorrect. It looks like you confused the binary operators with the unary operators.

 

C++ follows proper order of operations for arithmetic. The table in your link also shows that addition and subtraction are "Left-to-right" associative which is the opposite of what you wrote.

x = (((r + t) - g) + f) // brackets are of course unnecessary and are just included for comparison to the quoted answer

[mathijs727]

 

This is incorrect. It looks like you confused the binary operators with the unary operators.

 

C++ follows proper order of operations for arithmetic. The table in your link also shows that addition and subtraction are "Left-to-right" associative which is the opposite of what you wrote.

x = (((r + t) - g) + f) // brackets are of course unnecessary and are just included for comparison to the quoted answer

My bad i mixed up the different +/- symbols.