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PSeInt Redimensionar: arrays that grow

2 examples

How it works

An array created with Dimension has a fixed size. Redimensionar changes that size while the program runs and keeps whatever was already stored in its slots.

It helps when you don't know how many values will come: a shopping list that grows with every item, or the numbers someone types until they enter 0. Each time a new value arrives, you grow the array by one slot and store it at the end.

Not every profile allows resizing. If yours doesn't, the classic alternative is to create a large array up front and keep the number of used slots in a variable.

Short example

The least you need to see it work. Copy it or open it in the editor.

resizing-arrays-redimensionar.psc · 16 lines
Algoritmo GrowingList    Definir n, i Como Entero    Definir dato Como Caracter    n <- 0    Dimension lista[1]    Leer dato    Mientras dato <> "end" Hacer        n <- n + 1        Redimensionar lista[n]        lista[n] <- dato        Leer dato    FinMientras    Para i <- 1 Hasta n Hacer        Escribir i, ". ", lista[i]    FinParaFinAlgoritmo

What it prints:

User answer: breadUser answer: milkUser answer: end1. bread2. milk
Open it in Codoritmo

Opens in the browser editor, nothing to install.

Solved exercises

Each exercise comes with the full code, its flowchart and a sample run.

  • Shopping List

    Adds items to a list that grows until you type FIN.

    Advanced

  • Contact Book

    Add, list and search contacts in a book that grows.

    Advanced

In the language reference

The instructions involved, explained one by one.

Other concepts

Codoritmo is an independent, open-source project inspired by PSeInt and compatible with its syntax. It is not affiliated with the PSeInt project. Official PSeInt website.