map a char freq in MIPS assembly lang

str.asm

.data
str1:	.asciiz "Enter String: "
	#.align 2
getc: 	.asciiz "Enter char: "
	#.align 2
ret: .asciiz "Character <ch> occurs in string <string> <n> times"

buffer: .space 100	#space to store our string
L1:	.space 2	#space for our char
L2:	.space 4	#space for our char’s frequency in string	


.text
.globl main

main:	la $a0, str1	#print string to terminal stored at str1
	li $v0, 4	#send string to stdout
	syscall		
	
	li $v0, 8	#read string from stdin
	la $a0, buffer	#load byte space into addr
	li $a1, 100 	#create byte space for string
	move $t0, $a0	#save string to t0
	syscall
	
	la $a0, ret	#load string to print results
	li $v0, 4	#send to stdout
	syscall

	la $a0, buffer	#reload byte space to primary addr
	move $a0, $t0	#primary address = t0 address (load pointer)
	li $v0, 4	#print out string
	syscall

	li $v0, 10 #kill program
	syscall