Question

我正在研究一个类项目，我要做的是，当消息提示“请输入一个整数：”并且alsoto输入一个字符时，请求用户输入2个整数，并输入一个字符“请输入一个运算符（+ ， *， -， /）“ 弹出。有人可以看看这段代码并告诉我我做错了什么？第一条指令打印但我得到一个带有字符输入的错误消息。

真的很感激

.data
prompt: .asciiz "Please enter an integer\n"
message: .asciiz "Please enter an operator (+, - , * , / ):"
usercharacter:  .space 2
.text
.globl main

main:
li $v0, 4           #system call code for printing a string is 4
la $a0, prompt      #adress of string is argument 0, to print string  

syscall             # telling the system to execute the action

li  $v0, 5              # system call for reading and displaying input
syscall             
move $t1, $v0               # store input one into register $a1

li $a0, message
li $v0, 4
syscall

la $a0,usercharacter
li $a1, 2     #allocating a space for 2 caracters 
li $v0 12
syscall

li $v0, 4           #system call code for printing a string is 4
la $a0, prompt      #adress of string is argument 0, to print string  

syscall             # telling the system to execute the action

li  $v0, 5              # system call for reading and displaying input
syscall                 
move $t2,$v0                #print the prompt message for the user to input 
li,$v0,10
syscall

Answer 1

我希望这有帮助，

问题输入1个整数和一个运算符（+， - ，*，/）然后是第二个整数。这是代码。

.data

input1: .asciiz "Please enter an integer: "
input2: .asciiz "Please enter an operator(+, -,  *, /): "
input3: .asciiz "Enter second value: "
newline:    .asciiz "\n"

.text
.globl main
main:

li  $v0, 4
la $a0, input1
syscall                           #printing input 1

li $v0, 5
syscall
                              #reading and storing first value
move $t1, $v0 

li $v0, 4
la $a0, input2
syscall                            #printing  input 2

li $v0, 12
syscall                          #reading operator
move $t9, $v0                    #storing operator

li $v0, 4
la $a0, newline
syscall

li $v0, 4
la $a0, input3
syscall                            #printing input 3
li $v0, 5
syscall
                                   #reading and storing second value

exit:
li $v0, 10
syscall                             # ending main

谢谢

当我运行此代码时，我的QTSPIM模拟器说错误

1 个答案: