如何在汇编中编写if-else？

Question

How do you write the if else statement below in assembly languange?

C Code:

If ( input < WaterLevel)
{
     MC = 1;
}
else if ( input == WaterLevel)
{
     MC = 0;
}

Pseudocode

If input < Water Level
Send  1 to microcontroller
Turn Motor On


Else if input == Water Level
Send 0 to microcontroller
Turn Motor Off

Incomplete Assembly: (MC- Microcontroller)

CMP Input, WaterLevel
MOV word[MC], 1

MOV word[MC], 2

Answer 1

If we want to do something in C like:

if (ax < bx)
{
    X = -1;
}
else
{
    X = 1;
}

it would look in Assembly like this:

 cmp    ax, bx      
 jl     Less  
 mov    word [X], 1    
 jmp    Both            
Less: 
 mov    word [X], -1  
Both:

Answer 2

Not knowing the particular assembly language you are using, I'll write this out in pseudocode:

compare input to waterlevel
if less, jump to A
if equal, jump to B
jump to C
A:
send 1 to microcontroller
turn motor on
jump to C
B:
send 0 to microcontroller
turn motor off
C:
...

For the first three commands: most assembly languages have conditional branch commands to test the value of the zero or sign bit and jump or not according to whether the bit is set.