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metatag-title=(a and b are treated as integers and int math is used | ugBASIC User Manual)
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metatag-description=(An isomorphic language for retrocomputers)
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metatag-og:title=(a and b are treated as integers and int math is used | ugBASIC User Manual)
metatag-og:description=(An isomorphic language for retrocomputers)
}}
====== ugBASIC User Manual ======
===== a and b are treated as integers and int math is used =====
==== PURPOSE ====
This is as expected c seems to be treated as int while d seems to be float Still, int math is used (d=3.0 and not 3.3333). This is IMHO not as it should be as data type is explicitly declared, regardless whether c and d are assigned to a int and float math should be used e and f are treated as float and float math is used This is as expected So far, it seems type of variables is determined by the type of their initialization value. This makes DIM statement useless though (except for arrays) g and h are treated as integers and int math is used This is confusing to me, as I would expect h be float (as it is assigned to a float expression). It seems to be inconsistent with what happens above. This raises an issue: If I have an expression where only int variables are used, but I want that expression to be calculated using float math, how can I do it? In the example above I do want h to be 3.33333 This works for j but not for k It seems this gives me a "workaround" for j (which seems a bit inconsistent as it is initialized with an int, see c above) but this means I need to "duplicate" my variables at each calculation
==== SOURCE CODE ====
a=10
b=a/3
PRINT "a,b "; a,b
DIM c,d AS FLOAT
c=100
d=c/3.0
PRINT "c,d "; c,d
e=10.0
f=e/3.0
PRINT "e,f "; e,f
g=10
h=g/3.0
PRINT "g,h "; g,h
i=10
DIM j AS FLOAT: j=i
j=j/3.0
DIM k AS FLOAT: k=i/3.0
PRINT "i,j,k "; i,j,k
==== SOURCE FILE ====
* ''[[https://github.com/spotlessmind1975/ugbasic/tree/main/examples/bug_data_type.bas|bug_data_type.bas]]''
==== HOW TO COMPILE AND RUN ====
The instructions here refer to compiling the example from the command line. For Microsoft Windows users we suggest using **[[https://spotlessmind1975.itch.io/ugbasic-ide|UGBASIC-IDE]]**, which allows you to compile the example with just one click.=== ATARI 400/800 family ===
In order to compile and run the example, you need to have the Altirra emulator, and in particular that the ''altirra'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.atari bug_data_type.bas -o example.xex
altirra example.xex
# Windows
ugbc.atari.exe bug_data_type.bas -o example.xex
altirra example.xex
=== ATARI 600XL/800XL/1200XL/XG(SE) family ===
In order to compile and run the example, you need to have the Altirra emulator, and in particular that the ''altirra'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.atarixl bug_data_type.bas -o example.xex
altirra example.xex
# Windows
ugbc.atarixl.exe bug_data_type.bas -o example.xex
altirra example.xex
=== Commodore 64 ===
In order to compile and run the example, you need to have the VICE emulator, and in particular that the ''x64sc'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.c64 bug_data_type.bas -o example.prg
x64sc example.prg
# Windows
ugbc.c64.exe bug_data_type.bas -o example.prg
x64sc example.prg
=== Commodore 64+REU ===
In order to compile and run the example, you need to have the VICE emulator, and in particular that the ''x64sc'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.c64reu bug_data_type.bas -o example.prg
x64sc -reu example.prg
# Windows
ugbc.c64reu.exe bug_data_type.bas -o example.prg
x64sc -reu example.prg
=== Commodore PLUS/4 ===
== Using YAPE ==
In order to run the example, you need to have the YAPE emulator. In particular that the ''yape'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.plus4 bug_data_type.bas -o example.prg
yape example.prg
# Windows
ugbc.plus4.exe bug_data_type.bas -o example.prg
yape example.prg
== Using VICE ==
In order to run the example, you need to have the VICE emulator. In particular that the ''xplus4'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.plus4 bug_data_type.bas -o example.prg
xplus4 example.prg
# Windows
ugbc.plus4.exe bug_data_type.bas -o example.prg
xplus4 example.prg
=== Dragon 32 ===
In order to compile and run the example, you need to have the XROAR emulator, and in particular that the ''xroar'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.d32 bug_data_type.bas -o example.bin
xroar -rompath (your rom path) example.bin
# Windows
ugbc.d32.exe bug_data_type.bas -o example.bin
xroar.exe -rompath (your rom path) example.bin
=== Dragon 64 ===
In order to compile and run the example, you need to have the XROAR emulator, and in particular that the ''xroar'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.d64 bug_data_type.bas -o example.bin
xroar -rompath (your rom path) example.bin
# Windows
ugbc.d64.exe bug_data_type.bas -o example.bin
xroar.exe -rompath (your rom path) example.bin
=== PC128 Olivetti Prodest ===
In order to compile and run the example, you need to have the DCMOTO emulator, and in particular that the ''dcmoto'' executable is accessible.
Then, type this command on the command line and on the emulator:
# Linux
ugbc.pc128op bug_data_type.bas -o example.k7
dcmoto
(choose BASIC 128)
CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
# Windows
ugbc.pc128op.exe bug_data_type.bas -o example.k7
dcmoto
(choose example.k7)
(choose BASIC 128)
CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
=== Thomson MO5 ===
In order to compile and run the example, you need to have the DCMOTO emulator, and in particular that the ''dcmoto'' executable is accessible.
Then, type this command on the command line and on the emulator:
# Linux
ugbc.pc128op bug_data_type.bas -o example.k7
dcmoto
(choose BASIC 128)
CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
# Windows
ugbc.pc128op.exe bug_data_type.bas -o example.k7
dcmoto
(choose example.k7)
(choose BASIC 128)
CLEAR,&H2FFF: LOADM"CASS:",R: EXEC
=== Commodore VIC-20 ===
In order to compile and run the example, you need to have the VICE emulator, and in particular that the ''xvic'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.vic20 bug_data_type.bas -o example.prg
xvic --memory 24k example.prg
# Windows
ugbc.vic20.exe bug_data_type.bas -o example.prg
xvic --memory 24k example.prg
=== ZX Spectrum ===
In order to compile and run the example, you need to have the Speccy emulator, and in particular that the ''speccy'' executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.zx bug_data_type.bas -o example.tap
Speccy example.tap
# Windows
ugbc.zx.exe bug_data_type.bas -o example.tap
Speccy example.tap
=== MSX ===
In order to compile and run the example, you need to have the openMsx or the BlueMSX emulator, and in particular that its executable is accessible.
Then, type this command on the command line:
== openMSX ==
# Linux
ugbc.msx1 bug_data_type.bas -o example.rom
openmsx -cart example.rom
# Windows
ugbc.msx1.exe bug_data_type.bas -o example.rom
openmsx -cart example.rom
== blueMSX ==
# Linux
ugbc.msx1 bug_data_type.bas -o example.rom
bluemsx example.rom
# Windows
ugbc.msx1.exe bug_data_type.bas -o example.rom
bluemsx example.rom
=== ColecoVision ===
In order to compile and run the example, you need to have the openMsx or the BlueMSX emulator, and in particular that its executable is accessible.
Then, type this command on the command line:
== openMSX ==
# Linux
ugbc.coleco bug_data_type.bas -o example.rom
openmsx -machine \"COL - ColecoVision\" -cart example.rom
# Windows
ugbc.coleco.exe bug_data_type.bas -o example.rom
bluemsx -machine \"COL - ColecoVision\" example.rom
== blueMSX ==
# Linux
ugbc.coleco bug_data_type.bas -o example.rom
bluemsx /machine \"COL - ColecoVision\" /rom1 example.rom
# Windows
ugbc.coleco.exe bug_data_type.bas -o example.rom
bluemsx /machine \"COL - ColecoVision\" /rom1 example.rom
=== SEGA SC-3000 ===
In order to compile and run the example, you need to have the BlueMSX emulator, and in particular that its executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.sc3000 bug_data_type.bas -o example.rom
bluemsx /machine \"SEGA - SC-3000\" /rom1 example.rom
# Windows
ugbc.sc3000.exe bug_data_type.bas -o example.rom
bluemsx /machine \"SEGA - SC-3000\" /rom1 example.rom
=== SEGA SG-1000 ===
In order to compile and run the example, you need to have the BlueMSX emulator, and in particular that its executable is accessible.
Then, type this command on the command line:
# Linux
ugbc.sg1000 bug_data_type.bas -o example.rom
bluemsx /machine \"SEGA - SG-1000\" /rom1 example.rom
# Windows
ugbc.sg1000.exe bug_data_type.bas -o example.rom
bluemsx /machine \"SEGA - SG-1000\" /rom1 example.rom
==== ANY PROBLEM? ====
If you have found a problem trying to run this example, if you think there is a bug or, more simply, you would like it to be improved, [[https://github.com/spotlessmind1975/ugbasic/issues/new?title=IMPROVE a and b are treated as integers and int math is used|open an issue]] for this example on GitHub. Thank you!===== POWERED BY =====
[[:ugbasic:user:examples|{{ :ugbasic:user:logo-ugbasic.png?nolink&600 |}}]]