Casio FX-890P User Manual

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To interrupt execution of the TRACE mode
Lets run again the program in TRACE mode:
.R U N . .
>run
(F1-5) printf(“HELLO¥n”);
Break?_
1. You can press T or . . to execute the line and carry on the TRACE mode.
2. You can press BRK to exit the program, but stay in TRACE mode. This is useful if
you want to re-run the program because you missed something.
To exit the TRACE mode
There are four different methods that you can use to exit the TRACE mode.
1. Enter the TROFF command and press . .. “TROFF” stands for trace off.
2. Exit the interpreter while entering the editor or the MENU mode. This
automatically exits the TRACE mode.
3. Switch the power of the computer OFF. This automatically exits the TRACE
mode.
4. Press N during TRACE mode execution when prompted “Break?_” to exit the
TRACE mode and finish executing the program.
Variable Test Function
During TRACE mode execution of a program, you can press D when prompted
“Break?_”.
.T R O N . .
.R U N . .
>run
(F1-5) printf(“HELLO¥n”);
Break?_
.D.
(F1-5) printf(“HELLO¥n”);
Break?d
var>
Entering the name of the variable followed by . . will give you the type and value of
the variable at this stage of the execution of the program.
Entering only . . will resume the TRACE mode execution.
6.2 Introduction to C
This chapter tells you about the important points and rules to remember when
creating C programs. Simply work with the example programs presented in this
chapter to become familiar with proper procedure. This chapter puts you on the route
to becoming a C programmer.
6.2.1 Outputting characters
Creating a program to output character strings
We have already some experience in chapter 6.2 with a few simple programs that
output lines of characters to the display. Here, let’s try understanding how it works.

Casio FX-890P Specifications

General

Brand	Casio
Model	FX-890P
Category	Desktop
Language	English

Summary

Unit Configuration

Operational Functions

Details the primary keys and their functions, including power, shift, and numeric keys.

Keyboard Layout

Describes the arrangement of keys and how to access different functions.

Power and System Features

Power Supply and Battery Replacement

Provides instructions for replacing the calculator's batteries.

Fundamental Operation Modes

CAL Mode

Describes the primary calculation mode active upon power-on.

Formula Storage Function

Explains how to store and recall mathematical formulas for repeated calculations.

Programming Modes

Introduces BASIC, C, CASL, and Assembler modes for programming.

Calculation Functions

Manual Calculation Input and Correction

Guides on entering and correcting arithmetic and function calculations.

Scientific Calculations

BASIC Programming

Features of BASIC

Highlights the advantages and capabilities of the BASIC language.

BASIC Program Configuration

BASIC Program Input

Provides steps for entering and preparing BASIC programs.

BASIC Program Execution

Details how to run BASIC programs and handle execution errors.

BASIC Variables and Commands

Variables

Explains numeric, string, and array variables in BASIC.

BASIC Command Reference

A comprehensive reference for BASIC commands and functions.

BASIC Command Reference Details

Mathematical Functions

Reference for ABS, ACS, ANGLE, COS, SIN, SQR, TAN, etc.

BASIC String and Graphical Functions

C Programming Introduction

The Basics of C

Learning C with Pocket Computer

Guidance on using the pocket computer as a C learning tool.

Meet the Casio C Interpreter

Introduces the C interpreter and its operation compared to compilers.

C Program Input Procedures

C Interpreter and Editor Overview

Activating C Mode

Using the C Editor

Details on creating and editing C source code.

C Program Execution

Executing C Programs

Trace Function

C Programming Essentials

Outputting Characters

Variable Types and Operations

Covers C data types (char, int, float, double) and assignments.

Entering Characters and Values

Selection Statements

Explains the 'if' and 'if-else' statements for conditional logic.

C Control Flow and Functions

Using Loops

Details 'while', 'do-while', and 'for' loops for repetitive execution.

Defining Functions

Explains how to create and use custom functions in C.

C Constants, Variables, and Operators

Constants and Variables

Covers variable scope, types, and storage.

Local Variables and Global Variables

Pointers and Variable Storage Locations

Data Types and Lengths

C Operators and Command Reference

Operators

Lists and explains C operators and their precedence.

C Command Reference

Reference for C commands like RUN, EDIT, TRON, TROFF.

C Command Reference Details

Manual Commands

Fundamental Commands

String Functions

Reference for strcat, strchr, strcmp, strcpy, strlen.

Graphical Functions