#Robert Entenmann
#04/15/2018
#Find Minimum and Maximum of 4 numbers

.data
    Num1:       .word       0
    Num2:       .word       0
    Num3:       .word       0
    Num4:       .word       0
    Min1:       .word       0
    Max1:       .word       0
    Min2:       .word       0
    Max2:       .word       0
    Min3:       .word       0
    Max3:       .word       0

    msg1:       .asciiz     "Please input a number: "
    msg2:       .asciiz     "Please input a number: "
    msg3:       .asciiz     "The maximum of the four numbers is "
    msg4:       .asciiz     "The minimum of the four numbers is "


.text
.globl  main            #Start of main
.ent    main
main:

    jal readtwo
    sw $t0, Num1
    sw $t1, Num2

    jal findminmax
    sw $t2, Min1
    sw $t3, Max1

    jal readtwo
    sw $t0, Num3
    sw $t1, Num4

    jal findminmax
    sw $t2, Min2
    sw $t3, Max2

    jal findminmax
    sw $t2, Min3
    sw $t3, Max3

    li $v0, 4
    la $a0, msg3
    syscall

    lw $a0, Max3
    li $v0, 1
    syscall

    li $v0, 4
    la $a0, msg4
    syscall

    lw $a0, Min3
    li $v0, 1
    syscall

.end    main            #End of main


.globl  readtwo         #Start of readtwo function
.ent    readtwo
readtwo:

    li $v0, 4           #prompts user to input a number
    la $a0, msg1
    syscall

    li $v0, 5           #Gets users input
    syscall
    move $t0, $v0

    li $v0, 4           #prompts user to input a second number
    la $a0, msg2
    syscall

    li $v0, 5           #Gets users second input
    syscall
    move $t1, $v0

    jr $ra

.end    readtwo         #End of readtwo function


.globl  findminmax      #Start of findminmax function
.ent    findminmax
findminmax:

    bgt $t3, $t0, $t1
    blt $t2, $t0, $t1

    jr $ra

.end    findminmax      #End of findminmax function