Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Videos > MIPS Assembly Programming Simplified > MIPS Tutorial 19 Getting User's Input integers
MIPS Tutorial 19 Getting User's Input integers Video Lecture | MIPS Assembly Programming Simplified - Electronics and Communication Engineering (ECE)
FAQs on MIPS Tutorial 19 Getting User's Input integers Video Lecture - MIPS Assembly Programming Simplified - Electronics and Communication Engineering (ECE)
| 1. How can I get user input for integers in MIPS? |  |
Ans. In MIPS, you can use the syscall instruction to get user input for integers. You need to use the appropriate system call number and store the user input in a register using the read_int syscall. Here's an example code snippet:
```assembly
li $v0, 5 # load the system call number for read_int
syscall # perform the system call
move $t0, $v0 # move the user input to register $t0
```
| 2. What is the purpose of the syscall instruction in MIPS? | |
Ans. The syscall instruction in MIPS is used to perform various system calls, allowing interaction between the MIPS program and the operating system. It provides a way to perform tasks such as input/output operations, memory allocation, and exiting the program. Different system call numbers are used to indicate the specific task to be performed.
| 3. How do I prompt the user for input in MIPS? | |
Ans. To prompt the user for input in MIPS, you can use the syscall instruction with the appropriate system call number for displaying a string. Here's an example code snippet:
```assembly
li $v0, 4 # load the system call number for printing a string
la $a0, prompt_message # load the address of the prompt message
syscall # perform the system call
...
.data
prompt_message: .asciiz "Enter an integer: "
```
In this example, the prompt message is stored in the data section with the label "prompt_message", and its address is loaded into register $a0. The syscall instruction is then used to display the prompt message.
| 4. How can I store the user input in a specific register in MIPS? | |
Ans. After performing the read_int syscall in MIPS, the user input will be stored in register $v0. If you want to store it in a different register, you can use the move instruction to copy the value from $v0 to the desired register. Here's an example code snippet:
```assembly
li $v0, 5 # load the system call number for read_int
syscall # perform the system call
move $t0, $v0 # move the user input to register $t0
```
In this example, the user input is initially stored in $v0, and then it is moved to register $t0 using the move instruction.
| 5. How can I handle invalid user input in MIPS? | |
Ans. In MIPS, you can handle invalid user input by checking the return value of the read_int syscall. If the user provides invalid input (e.g., a non-integer value), the return value will be -1. You can then handle this situation accordingly in your program. For example, you can display an error message and prompt the user to enter a valid integer.
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Nov 24, 2024 Last updated |
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