bonian home work

Bonian_hm.asm

.data
wmsg : .asciiz "welcome \nstudent : Mohmmad Eyad Arnabeh \nNum : 345 \n"
getmsg : .asciiz "Please Enter a statment : \n"
msg0 : .asciiz "your sentence is : "
msg1 : .asciiz "Please Enter a character :\n"
msg2 : .asciiz "your char is :\n"
msg3 : .asciiz "not found \n"

str : .space 256
chr : .space 1

.text

.globl main
main:

#printing the welcome message .
 la $a0,wmsg
 li $v0,4
 syscall

#ask the user to insert a statment .
 la $a0,getmsg
 li $v0,4
 syscall

#get user string
 li $v0,8
 syscall
 move $s0,$a0

#print it
 li $v0,4
 la $a0,msg0
 syscall
 li $v0,4
 move $a0,$s0
 syscall

#ask the user to enter a char
 la $a0,msg1
 li $v0,4
 syscall

#get user char
 li $v0,8
 la $a0,chr
 syscall

#print usr char
 li $v0,4
 la $a0,msg2
 syscall

 la $a0,chr
 li $v0,4
 syscall
# search

 add $t1,$zero,$zero #make $t1 zero
 lb $s1,chr

 search :

 # t0 contain the currnet value
 # t3 contain the currnet address
 # t1 contain the index

 add $t3,$t1,$s0 #go to the next index in array
 lb $t0,0($t3)   #loading the value of array[t1]
 beq $t0,$zero,nfound #if not end of array
 addi $t1,$t1,1 # t1+=1
 bne $t0,$s1,search # if array[t1] != chr go to search (not found)
 beq $t0,$s1,found  # if array[t1] == chr go to search (found)

 found :
   li $v0,4
   move $a0,$t3
   syscall
   li $v0,10
   syscall
 nfound :
  la $a0,msg3
  li $v0,4
  syscall

 li $v0,10
 syscall