2. RdSt : to read a string from the memory, suppose that the address of the buffer is in $ae, and the maximum number of the characters is in $a1

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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In this assignment you are required to write some functions in MIPS as follow:
1. StLen : to count the length of a terminated string, suppose that the address of the string is
in $ae and the length of the string is in $ve
2. RdSt : to read a string from the memory, suppose that the address of the buffer is in $a0, and
the maximum number of the characters is in $a1
3. SubSt : get the substring of a given string based on the passed indexes, It is similar to substring()
in Java . the below example to show the idea
public class SubStringExamplet
public static void main (String args[1)
string str- new String("quick brown fox jumps over the lazy dog"):
System.out.println ("Substring starting from index 15: "):
System.out.println (str.subst ring (15)):
System.out.println ("Substring starting from index 15 and ending at
20:"):
System.out.printin (str.substring (15, 20)1:
Output:
Subatring starting from index 15:
jumps over the lazy dog
Substring starting from index 15 and ending at 20:
jump
You may use the registers $a0-$a3 for the address of the string, the address of the buffer, the start
index, and the end index.
Then you are required to write the main program to ask the user to input a string then you call the
three function and print the results. Below an example of how your code will be working.
Enter a string:
Computer Organization
Length of the string is 21
Start index : 1
End Index : 5
Substring is: omput
Transcribed Image Text:In this assignment you are required to write some functions in MIPS as follow: 1. StLen : to count the length of a terminated string, suppose that the address of the string is in $ae and the length of the string is in $ve 2. RdSt : to read a string from the memory, suppose that the address of the buffer is in $a0, and the maximum number of the characters is in $a1 3. SubSt : get the substring of a given string based on the passed indexes, It is similar to substring() in Java . the below example to show the idea public class SubStringExamplet public static void main (String args[1) string str- new String("quick brown fox jumps over the lazy dog"): System.out.println ("Substring starting from index 15: "): System.out.println (str.subst ring (15)): System.out.println ("Substring starting from index 15 and ending at 20:"): System.out.printin (str.substring (15, 20)1: Output: Subatring starting from index 15: jumps over the lazy dog Substring starting from index 15 and ending at 20: jump You may use the registers $a0-$a3 for the address of the string, the address of the buffer, the start index, and the end index. Then you are required to write the main program to ask the user to input a string then you call the three function and print the results. Below an example of how your code will be working. Enter a string: Computer Organization Length of the string is 21 Start index : 1 End Index : 5 Substring is: omput
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