Write a MIPS assembly language program that prompts the user to input 3 integers

Question

Write a MIPS assembly language program that prompts the user to input 3 integers and then prints out the average of the 3 numbers (integer division is OK for this problem). You do not need to validate the user input.

Explanation / Answer

Here is the code to find average In MIPS language .data size_prompt: .asciiz "Enter number of elements: " element_prompt: .asciiz "Enter an element: " msg_space: .asciiz " " .text .globl main main: # prompt user for number of elements la $a0,size_prompt li $v0,4 syscall # get array count from user li $v0,5 syscall move $s0,$v0 # save array count li $t0,0 # i = 0 stack: beq $t0,$s0,sumlist # input done (i.e. i >= count)? if yes, fly # prompt user for list element la $a0,element_prompt li $v0,4 syscall # read in element value li $v0,5 syscall # push element to stack addi $sp,$sp,-4 sw $v0,0($sp) addi $t0,$t0,1 # i += 1 j stack # get sum of array elements # t6 -- sum value sumlist: li $t6,0 # sum = 0 move $t4,$s0 # get the count sumlist_loop: beqz $t4,average # at end? if yes, fly # pop element off stack lw $t7,0($sp) # get next array element value addi $sp,$sp,4 # advance array pointer add $t6,$t6,$t7 # sum += array[i] addi $t4,$t4,-1 # bump down the count j sumlist_loop # get average # t6 -- sum value # t5 -- average value average: # print the sum li $v0,1 move $a0,$t6 # get the sum syscall div $t6,$s0 # compute sum / count mflo $t5 # retrieve it # output a space li $v0,4 la $a0,msg_space syscall # print average move $a0,$t5 li $v0,1 syscall exit: li $v0,10 # exit program Syscall

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