Write a MIPS assembly language program that prompts the user to input two string

Question

Write a MIPS assembly language program that prompts the user to input two strings (each should be no longer than 50 characters including the null terminator). Your program should determine whether the second string is a substring of the first. If it is, then your program should print out the first index in which the second string appears in the first. For example, if the first string is “Hello World” and the second string is “lo”, then the program should print out 3, i.e. the starting index of “lo” in “Hello World.” If the second string is not contained in the first string, then your program should print out -1.

Explanation / Answer

Here is the clear solution for your problem

.data
    out_str: .asciiz "Enter the String Max of size 50 "
    out_int: .asciiz "Enter the Integer index "
    userInput_str: .space 50
  
.text
    main :  
    #1. Taking string as input from user and store it in userInput_str
    li $v0, 4         
    la $a0, out_str       #load Address
    syscall
      
    li $v0, 8
    la $a0, userInput_str
    li $a1, 50
    syscall
      
    #Taking integer index as input from user
    li $v0, 4         
    la $a0, out_int       #load Address
    syscall
      
    li $v0, 5
    syscall
    move $t0, $v0      

    #Display Name
  
    la $a1,userInput_str
    addu $a1,$a1,$t0
    li $v0,4
    la $a0, 0($a1)
    syscall            # and print it
              
    #end of program
    li $v0,10
    syscall
  
    exit:

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