https://github.com/rollbear/basicpp

BASIC in C++
https://github.com/rollbear/basicpp

Last synced: 18 days ago
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BASIC in C++

• Host: GitHub
• URL: https://github.com/rollbear/basicpp
• Owner: rollbear
• License: unlicense
• Created: 2015-06-20T13:13:48.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2020-10-31T04:46:33.000Z (about 4 years ago)
• Last Synced: 2024-07-31T22:49:39.133Z (3 months ago)
• Language: C++
• Size: 21.5 KB
• Stars: 178
• Watchers: 10
• Forks: 15
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
## **`C++`** today is as simple as **`BASIC`** was in the 80s

Single header **`BASIC`** emulation in **`C++`**. This is based on my

(flawed) memory of the **`BASIC`** dialect in the

[EACA](https://en.wikipedia.org/wiki/EACA)

[Colour Genie](https://en.wikipedia.org/wiki/Colour_Genie) computer I

got on my 15th birthday.

## Versions

* [Original BASIC](#basic) - AKA Dartmouth BASIC

* [Structured BASIC] (#sbasic)

## Basic

*Original BASIC - AKA Dartmouth BASIC*

Header file: [basic.hpp](./basic.hpp) 

### Example program:

```Cpp

#include "basic.hpp"

int main()

{

  _10: LET COUNT = 1;

  _20: LET SUM = 0;

  _30: LET STACK$ = ".";

  _40: LET TRY = 0;

  _50: FOR TRY = 3 TO 1 STEP -1;

  _60: PRINT "You have ", TRY, " chances to get this right: ";

  _70: INPUT "Enter a positive number ", COUNT;

  _80: IF COUNT > 0 THEN GOTO _130;

  _90: PRINT "I said positive. ", COUNT, " isn't";

 _100: NEXT;

 _110: PRINT "I give up on you!";

 _120: END;

 _130: GOSUB _160;

 _140: PRINT "SUM=", SUM, " STACK=", STACK$;

 _150: END;

 _160: SUM = SUM + COUNT;

 _170: COUNT = COUNT - 1;

 _180: IF COUNT > 0 THEN GOSUB _160;

 _190: STACK$ = STACK$ + STACK$;

 _200: RETURN;

}

```

## SBASIC

*Structured BASIC - AKA SBASIC*

Header file: [structured_basic.hpp](./structured_basic.hpp)

### Example program:

```Cpp

#include "structured_basic.hpp"

int main()

{

  _10: LET X = 1;

  _20: INPUT "enter a positive number: " , X;

  _30: IF X > 0 THEN GOTO _60;

  _40: PRINT "Positive means greater than 0";

  _50: GOTO _20;

  _60: LET i = 0;

  _70: DO ;

  _80: PRINT i+1, " Basic is awesome";

  _90: i = i + 1 ;

 _100: LOOP WHILE ( i < X );

}

```

## Limitations

* C++11 or later (easy to back-port, but why?)

* Those pesky semicolons...

* Variables must be defined prior to use

* Can't be used in kernel modules ;-)

* Many language features missing, e.g. PRINT USING and Most I/O

PR's for fixes and added functionality are most welcome.