2D arrays in pseudocode

Avuya Mxoli

Hello everyone,
I'm working on an assignment where I have to read records from a file and load them in parallel arrays. the student names are in a 1D array and the three marks for that student are in a 2D array. I need to load these and Im not sure how to use 2D arrays in pseudocode plz help,
thanks

4 Replies

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Vulpes15y ago
Accepted answer
FWIW here's my attempt at some pseudo-code:

READ all lines from students.txt into a 'lines' array
STORE the number of elements in 'lines' in 'len'
CREATE an array 'names' of length 'len'
CREATE a two dimensional array 'marks' whose dimensions have lengths 'len' and 3

FOR i = 0 TO len - 1

TRIM lines[i] of any leading or trailing space
SPLIT lines[i] into 4 individual items using a comma as separator
STORE the items in an 'items' array
names[i] = items[0]

FOR j = 1 TO 4

CONVERT items[j] to an integer 'k'
marks[i, j-1] = k

NEXT j

NEXT i

I've expressed the 2 dimensional array using the marks[i,j] syntax rather than marks[i][j].

This is because the array is rectangular rather than jagged and C# distinguishes between the two using the above syntax.
Sam Hobbs15y ago
The format of pseudocode is determined by you. It is anything that helps you. If it has a format defined by someone else then it is not pseudocode.

If someone such as a professor says that pseudocode is supposed to be in a specified format, then you must get that format from that professor.
Avuya Mxoli15y ago
Thanks but I already have a similar c# code I just cant get the syntax for pseudocode, thanks anyway
Vulpes15y ago
I'm not too good at pseudo-code but, if it helps, here's the C# code to do what you want:

using System;
using System.IO;

class Program
{
static void Main()
{

string[] lines = File.ReadAllLines("students.txt"); // read all the lines into an array
int len = lines.Length; // find the number of lines
string[] names = new string[len]; // create a 1D array of students
int[,] marks = new int[len, 3]; // create a 2D array of marks, in the same order as the students

for(int i = 0; i < len; i++)
{
string[] items = lines[i].Trim().Split(','); // assume data is comma separated in file
names[i] = items[0]; // name is the first item
for(int j = 1; j < 4; j++) marks[i, j - 1] = int.Parse(items[j]); // marks are the second, third and fourth items
}

// check it worked
for(int i = 0; i < len; i++)
{
Console.WriteLine("{0,-20} {1,3} {2,3} {3,3}", names[i], marks[i, 0], marks[i, 1], marks[i, 2]);
}

Console.ReadKey();
}
}