MIPS如何存储用户输入并将其打印出来

时间:2013-04-25 02:04:05

标签: assembly printing input mips

我应该为这个问题做些什么,我需要存储这些值,并打印出一个矩阵,用户要求输入行数,列数和元素值,现在我甚至都没有知道我是否正确打印/存储部分,我试图打印输入的单个字符串,但它不起作用

    .text
    .globl main

main:
addi $v0, $0, 4   
la   $a0, str1 
syscall             #printing str1 
addi $v0, $0, 5   
syscall 
la $t1, M1_1
sw $v0, 0($t1)      #reading and storing the number of rows 

addi $v0, $0, 4   
la   $a0, str2 
syscall             #printing str2 
addi $v0, $0, 5   
syscall 
la $t2, M1_2
sw $v0, 0($t2)      #reading and storing the number of columns   

addi $v0, $0, 4   
la   $a0, str3 
syscall             #printing str3 
addi $v0, $0, 5   
syscall 
la $t3, M1_3
sw $v0, 0($t3)      #reading and storing the value of element   


    .data


str1:.asciiz "\“Please enter the number of rows in the matrix\n"
str2:.asciiz "\“Please enter the number of columns\n"
str3:.asciiz "\“Please enter the elements of the matrix\n"
.align 2
M1:.space 256 
M1_1:.space 4
M1_2:.space 4
M1_3:.space 4
M2:.space 256 
M2_2:.space 4

1 个答案:

答案 0 :(得分:2)

在SPIM中单步执行代码后,行sw $v0, 0($t1)似乎成了问题。我建议使用sw命令,而不是使用$t0将输入移动到寄存器move中。在下面的代码示例中,我修改了您的代码,以演示如何将您作为输入接收的值保存到寄存器$t0中:

    .text
    .globl main

main:
    sub         $sp , $sp , 4           # push stack
    sw          $ra , 0 ( $sp )     # save return address

    addi        $v0 , $0 , 4   
    la          $a0 , str1 
    syscall     #printing str1

    addi        $v0 , $0 , 5   
    syscall     #get input

    move        $t0 , $v0               # save input in $t0
    move        $a0 , $v0
    addi        $v0 , $0 , 1
    syscall     #print first input

    ...

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