簡單選擇排序：
第i次掃描，在r[i]到r[n]中挑選最小的，放在r[i]

.data
array: .word 13,27,38,97,76,65,49
.text
la $a0,array
li $t0,6
lp0:
addi $a1,$a0,4
addi $t1,$t0,-1#counter
lp1:
lw   $t2,($a0)#取出本次循環(huán)比較的單元
lw   $t3,($a1)
ble  $t2,$t3,next
sw   $t2,($a1)
sw   $t3,($a0)#交換位置
next:
addi $a1,$a1,4
addi $t1,$t1,-1
bgt   $t1,$0,lp1
addi $t0,$t0,-1
bgt   $t0,$0,lp0
li      $v0,10
syscall