PSeInt profile ITESM TC1001

These are the rules of the ITESM TC1001 profile, explained simply, with an example that follows them and opens in Codoritmo with one click.

Open in Codoritmo with this profile

Opens this page's example with the ITESM TC1001 profile already switched on.

How its author describes it

The profile's original text, in Spanish, as distributed with PSeInt.

Perfil para el curso de Introducción a la Computación (TC1001) que se imparte en el Instituto Tecnológico de Monterrey (enviado por Ma. Guadalupe Roque).

In short

What changes compared with Codoritmo's default profile:

Every variable needs a value before it is used
The Para counter is protected
You can assign with = as well as <-
Only the symbols & | ~ % work as operators
No conditions like Es Par: comparisons use operators
Arrays start at 0
Counting down needs Con Paso -1
No text functions such as Longitud or Subcadena

All of its rules

Marked rules differ from Codoritmo's default profile; everything else behaves the same.

Variables

How they are declared and when they can be used.

Declare variables with Definir: Optional. You can use a variable without declaring it: its type comes from the first value you store in it.
Give a value before useDiffers from default: Required. Reading a variable, or an array slot, that has no value yet stops the program with an error. That's why accumulators start with something like suma <- 0.
Protected Para counterDiffers from default: Inside a Para you can't change the counter, and once the loop ends the counter has no value, so don't use it afterwards.
Accents and ñ in names: Allowed: a variable can be called año or posición.

Writing style

Punctuation, closing words and how values are assigned.

Semicolon at the end: Optional. You can end statements with ; or leave it out.
Relaxed syntax: Accepts handy variants: Fin Si as two words, optional Entonces and Hacer, Mientras Que and Desde in loops, and values in Escribir separated by spaces.
Assign with =Differs from default: Allowed: besides x <- 5 you can write x = 5. Inside a condition, = is still a comparison.

Operators and conditions

How comparisons are written and text is put together.

Word operatorsDiffers from default: Symbols only: & instead of Y (and), | instead of O (or), ~ instead of NO (not) and % instead of MOD.
Plain-language conditionsDiffers from default: Doesn't accept them: write the comparison with operators, such as x MOD 2 = 0 or x > 5.
Join text with +: Allowed: "Hola, " + nombre makes a single piece of text.

Arrays

Where indexes start and how the size is set.

First array indexDiffers from default: Arrays start at 0: after Dimension notas[3] the slots are notas[0], notas[1] and notas[2].
Array size from a variable: Allowed: you can read n and then write Dimension datos[n].
Resize arrays: You can change the size of an existing array with Redimensionar.

Loops and Segun

Which ways of repeating and choosing between cases it accepts.

Para Cada loop: Available: Para Cada nota de notas Hacer goes through every slot of an array.
Repetir … Mientras Que: A Repetir loop can end with Hasta Que condition (until) or Mientras Que condition (while).
Para counting downDiffers from default: To count down you must write Con Paso -1; without it, Para i <- 3 Hasta 1 doesn't run at all.
Segun with whole numbers: The value a Segun checks can also be text, with options such as "a".

Subroutines and text functions

Which extra tools you get to organise the program.

Your own subroutines and functions: You can write your own SubProceso or Funcion to split the program into parts.
Text functionsDiffers from default: Not available: this profile has no Longitud, Subcadena, Mayusculas, Minusculas or Concatenar.

An example that follows these rules

It works out the average of three marks. It's written for this profile, and the comments point out what changes compared with the default. We checked it with Codoritmo's interpreter using these same rules.

PerfilITESMTC1001.psc · 37 lines

1// Example written with the rules of the ITESM TC1001 profile2Algoritmo PerfilITESMTC10013    Dimension notas[3]4    // Arrays start at 0: the slots are 0, 1 and 25    notas[0] <- 86    notas[1] <- 97    notas[2] <- 78    // Every variable needs a value before it is used9    // This profile also lets you assign with =10    suma = 011    Para i <- 0 Hasta 2 Hacer12        // Inside the Para you can't change i13        suma <- suma + notas[i]14    FinPara15    promedio <- suma / 316    nombre <- "Ana"17    Escribir "Hi, ", nombre18    Escribir "Average: ", promedio19    // No word operators: & instead of Y, % instead of MOD20    Si promedio >= 7 & promedio <= 10 Entonces21        Escribir "Passed"22    SiNo23        Escribir "Failed"24    FinSi25    // Es Par isn't accepted: the condition uses operators26    Si suma % 2 = 0 Entonces27        Escribir "The sum is even: ", suma28    SiNo29        Escribir "The sum is odd: ", suma30    FinSi31    Escribir "Countdown:"32    // Counting down needs Con Paso -133    Para i <- 3 Hasta 1 Con Paso -1 Hacer34        Escribir i35    FinPara36    // Longitud, Mayusculas and the other text functions aren't available37FinAlgoritmo

What it prints

This is the example's real output, run with the ITESM TC1001 profile.

Hi, Ana
Average: 8
Passed
The sum is even: 24
Countdown:
3
2
1