Program soul-algorithm, program soul-Algorithm

Program soul-algorithm, program soul-Algorithm

Nikilaus Wirth formula: program = Algorithm + Data Structure

The textbook holds that: program = Algorithm + Data Structure + programming method + language tools and environment.

Concept of Algorithms

An algorithm is a computer solution to a problem.

Algorithms are classified into numerical algorithms and non-numerical algorithms.

Algorithm features

Poor

Validity

Certainty

Zero or multiple inputs

One or more outputs

Use flowcharts to represent Algorithms

Traditional Flowchart

N-S flow chart

Three basic structures

Sequential Structure

Select Structure

Loop Structure

Structure Programming Method

Top-down, gradual refinement, modular design, and machine programming

From bottom up, gradually increase, modular design, Structured Programming