.data                               # data section
dataarray:      .word 0, 0, 0, 0    # data space for addition
prompt1: .asciiz "Summand eingeben: "
prompt2: .asciiz "Summe: "
prompt3: .asciiz "Wie viele Summanden moechten Sie eingeben? "


.text                            # text section
.globl main                      # call main by SPIM

main:
        li $t0,0                 # initialize t0 - offset
        li $s0,0                 # initialize s0 (result)
        li $s1,4                 # initialize counter variable

        li  $v0,4                # print string service
        la  $a0,prompt1          # write("Wie viele Summanden moechten Sie eingeben?")
        syscall

        li  $v0,5                # read integer service
        syscall

        move $s2,$v0             # Summand in $s2 schieben
        multu $s3,$s1,$s2       # Array-Ende


loop1:
        bgt $t0, $s3, filled      # jump if t0>12

        li  $v0,4                # print string service
        la  $a0,prompt1          # write("Summand eingeben: ")
        syscall

        li  $v0,5                # read integer service
        syscall

        sw $v0, dataarray($t0)   # store word v0 into A($t0)

        addi $t0,4               # adjust offset
        j loop1                  # jump to loop1

filled:
        li $t0,0                 # initialize t0 - offset

loop2:
        bgt $t0, $s3, done        # jump if t0>12

        lw $t2, dataarray($t0)   # load a value from the array to t2
        add $s0, $s0, $t2        # add t2 to the result

        addi $t0,4               # adjust offset
        j loop2                  # jump to loop2

done:
        li  $v0,4                # print string service
        la  $a0,prompt2          # write("Summe ausgeben: ")
        syscall

        li  $v0,1                # print integer service
        move $a0, $s0            # print result
        syscall

        li $v0, 10               # Exit program
        syscall