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44 lines
601 B
NASM
44 lines
601 B
NASM
.data
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string: .space 32
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in: .asciiz "Nhap chuoi can bien doi: "
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wrong: .asciiz "Chuoi da nhap khong hop le!"
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out: .asciiz "Chuoi sau khi bien doi la: "
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.text
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.globl main
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main:
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la $a0, in
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li $v0, 4
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syscall
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la $a0, string
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li $a1, 32
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li $v0, 8
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syscall
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move $t1, $a0
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loop:
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lb $t2, 0($t1)
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addi $t1, $t1, 1
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bnez $t2, loop
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exe:
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addi $t1, $t1, -3
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ble $t1, $a0, error
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lb $t4, 0($a0)
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lb $t5, 0($t1)
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sb $t4, 0($t1)
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sb $t5, 0($a0)
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j write
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error:
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la $a0, wrong
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li $v0, 4
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syscall
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j exit
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write:
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la $a0, out
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li $v0, 4
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syscall
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la $a0, string
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li $v0, 4
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syscall
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exit:
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li $v0, 10
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syscall
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