Algorithm and sequence

C · lesson 1 / 27

Algorithm and sequence

Observe how a sequence in the flowchart becomes a sequence of C statements executed in the same order.

1 · Observe and predict

The concept

A program moves from one statement to the next unless a control structure changes the flow.

Mental model:

START → output 1 → output 2 → END

2 · Flowchart First

Follow the same algorithm as a flowchart

Use Start and Step: when the active block changes, ConceptStep also highlights the C lines representing that same step.

Loading flowchart…

3 · Flowchart ↔ C · Run in Page

Watch the model become C

Follow the visualization, watch the source highlight, then predict the result and press Run C to compare the actual output with your prediction.

Two-output sequence Start the flowchart to synchronize the code

                        1#include <stdio.h>
                        2 
                        3int main(void)
                        4{
                        5    printf("Prima istruzione\n");
                        6    printf("Seconda istruzione\n");
                        7    return 0;
                        8}

stdin

Ready. Make a prediction before running.

stdout

Diagnostics

4 · Guided practice

Check your prediction

Which message is printed first?

Progress: 0 / 5 · correct: 0

Algorithm and sequence

C · lesson 1 / 27