MIPS:如何将用户输入的整数应用到算术函数中?

MIPS: how can I apply the integer which users input into arithmetic function?

这是我第一次编写 PCSPIM。我发现我的代码有点问题。

.data   

user_input: .asciiz "\n\nEnter an Integer for the value of n: " 
result_display: .asciiz "\nThe sum from 0 to n is "             
Greeting:   .asciiz "\n\nThank you!"    

.text
main:

#user input
li $v0, 4
la $a0, user_input
syscall

#allow user input
li $v0, 5
syscall

#store the input value into t8
move $t8, $v0

#calculation
addi $s0, $zero, $t8 

I wish to use the integer value ($t8) that users input into the #calculation section, but it ends up with error.

addi $t0, $zero, 0

loop1:

add $t0, $t0, $s0
addi $s0, $s0, -1
bne $s0, $zero, loop1
nop
nop

# Display the result
li $v0, 4
la $a0, result_display
syscall

# Print out the result
li $v0, 1
move $a0, $t0
syscall

# Greets the user
li $v0, 4
la $a0, Greeting
syscall

# Exit the program
li $v0, 10
syscall 

抱歉我的英语不好。

错误在于您使用 "addi" 指令的方式。该指令需要一个立即数(数字)值作为第三个操作数而不是架构寄存器传递。如果将 "addi" 指令更新为 "addu" 代码应该可以工作。