数组大小仅在MIPS的运行时已知 [英] Array size known only at runtime in MIPS

问题描述

所以我有一个棋盘游戏，希望用户输入棋盘的大小 3,4,5 ...将是3x3、4x4、5x5等...

So I have a board game and the user is expected to enter the size of the board 3,4,5 ...will be 3x3, 4x4, 5x5, etc...

这里:

board: .word 0:100  # declare a board of size 100 and make ints '0' , O = 1, X = 2

如您所见，这是静态声明...例如，我需要以某种方式使数组成为t0中找到的用户输入的大小...

As you can see, this is static declaration...I need to somehow make an array the SIZE of the user input found in t0 for example...

推荐答案

听起来您需要在堆上分配一些内存.为此，MARS仿真器syscall为$ v0 = 9，$ a0 =要分配的字节数，返回$ v0中已分配内存的地址.来源: MARS中可用的MIPS syscall函数

It sounds like you need to allocate some memory on the heap. The MARS emulator syscall for that is $v0 = 9, $a0 = number of bytes to allocate, returns address of allocated memory in $v0. Source: MIPS syscall functions available in MARS

所以您的步骤将是:

• 从用户那里获取数组大小
• 平方它
• 使用您计算出的大小进行syscall 9

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