如何在汇编中编写if-else？ [英] How to write if-else in assembly?

问题描述

你如何在汇编语言中写下if else语句？

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

C代码：

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

Pseudocode

Pseudocode

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


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

不完整的汇编：（MC-微控制器）

Incomplete Assembly: (MC- Microcontroller)

CMP Input, WaterLevel
MOV word[MC], 1

MOV word[MC], 2

推荐答案

如果我们想在C中做点什么：

If we want to do something in C like:

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

它会在大会中看起来像这样：

it would look in Assembly like this:

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

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