Hi.
I came across a strange errormessage and it might be a bug in the 1.0.5 version of the arduino software.
The part of the code that gets the error looks like this:
» if (i == 01) catchd01 = t;
if (i == 02) catchd02 = t;
if (i == 03) catchd03 = t;
if (i == 04) catchd04 = t;
if (i == 05) catchd05 = t;
if (i == 06) catchd06 = t;
if (i == 07) catchd07 = t;
if (i == 08) catchd08 = t;
if (i == 09) catchd09 = t;
«
And the compiler only complains on the last 2 lines.
error: invalid digit «8» in octal constant
error: invalid digit «9» in octal constant
So, whats wrong? it compiles good if all zeros are removed from the i == part.
But shouldnt it complain on all 9 lines if its the zero that is the problem.. why just 8 and 9?
because the compiler thinks you are using OCTAL number, and octal number
goes from 0 to 7.
Also, if this was a bug, was a COMPILER fault, you should had ask to
avr-gcc’s folks.
2013/6/30 sjoch notifications@github.com
Hi.
I came across a strange errormessage and it might be a bug in the 1.0.5
version of the arduino software.The part of the code that gets the error looks like this:
» if (i == 01) catchd01 = t;
if (i == 02) catchd02 = t;
if (i == 03) catchd03 = t;
if (i == 04) catchd04 = t;
if (i == 05) catchd05 = t;
if (i == 06) catchd06 = t;
if (i == 07) catchd07 = t;
if (i == 08) catchd08 = t;
if (i == 09) catchd09 = t;
«And the compiler only complains on the last 2 lines.
error: invalid digit «8» in octal constant
error: invalid digit «9» in octal constantSo, whats wrong? it compiles good if all zeros are removed from the i ==
part.
But shouldnt it complain on all 9 lines if its the zero that is the
problem.. why just 8 and 9?—
Reply to this email directly or view it on GitHubhttps://github.com//issues/1490
.
A constant number starting with «0» is interpreted as octal by the compiler, you must write «8» instead of «08».
BTW programming questions should be addressed to the forum.
http://forum.arduino.cc
C
Error solved but i need clear explanation can anybody explain .thank you
Error resuelto, pero necesito una explicación clara, ¿alguien puede explicarme? Gracias.
como lo solucionaste?
arduino
locked as resolved and limited conversation to collaborators
Oct 21, 2022
int arr[20][20] = {
{08,02,22,97,38,15,00,40,00,75,04,05,07,78,52,12,50,77,91,08},
{49,49,99,40,17,81,18,57,60,87,17,40,98,43,69,48,04,56,62,00},
{81,49,31,73,55,79,14,29,93,71,40,67,53,88,30,03,49,13,36,65},
{52,70,95,23,04,60,11,42,69,24,68,56,01,32,56,71,37,02,36,91},
{22,31,16,71,51,67,63,89,41,92,36,54,22,40,40,28,66,33,13,80},
{24,47,32,60,99,03,45,02,44,75,33,53,78,36,84,20,35,17,12,50},
{32,98,81,28,64,23,67,10,26,38,40,67,59,54,70,66,18,38,64,70},
{67,26,20,68,02,62,12,20,95,63,94,39,63,08,40,91,66,49,94,21},
{24,55,58,05,66,73,99,26,97,17,78,78,96,83,14,88,34,89,63,72},
{21,36,23,09,75,00,76,44,20,45,35,14,00,61,33,97,34,31,33,95},
{78,17,53,28,22,75,31,67,15,94,03,80,04,62,16,14,09,53,56,92},
{16,39,05,42,96,35,31,47,55,58,88,24,00,17,54,24,36,29,85,57},
{86,56,00,48,35,71,89,07,05,44,44,37,44,60,21,58,51,54,17,58},
{19,80,81,68,05,94,47,69,28,73,92,13,86,52,17,77,04,89,55,40},
{04,52,08,83,97,35,99,16,07,97,57,32,16,26,26,79,33,27,98,66},
{88,36,68,87,57,62,20,72,03,46,33,67,46,55,12,32,63,93,53,69},
{04,42,16,73,38,25,39,11,24,94,72,18,08,46,29,32,40,62,76,36},
{20,69,36,41,72,30,23,88,34,62,99,69,82,67,59,85,74,04,36,16},
{20,73,35,29,78,31,90,01,74,31,49,71,48,86,81,16,23,57,05,54},
{01,70,54,71,83,51,54,69,16,92,33,48,61,43,52,01,89,19,67,48}
};
I get the following error
q11.c:8:10: error: invalid digit "8" in octal constant
q11.c:8:67: error: invalid digit "8" in octal constant
q11.c:15:49: error: invalid digit "8" in octal constant
q11.c:17:19: error: invalid digit "9" in octal constant
q11.c:18:58: error: invalid digit "9" in octal constant
q11.c:22:16: error: invalid digit "8" in octal constant
q11.c:24:46: error: invalid digit "8" in octal constant
-
Скетч для робота с ик приемником, ide ругается:invalid digit «8» in octal constant
Понять в чем проблема смог, а как решить ее не могу понять все еще.
Скетч:const long IR_COMMAND_FORWARD_CODES[] = { 377281, 7503, 2 };
const long IR_COMMAND_BACKWARD_CODES[] = { 377282, 1583, 8 };
const long IR_COMMAND_TURN_LEFT_CODES[] = { 377278, 0783, 4 };
const long IR_COMMAND_TURN_RIGHT_CODES[] = { 377279, 7103, 6 };
const long IR_COMMAND_FORWARD_LEFT_CODES[] = { 377278, 4863, 1 };
const long IR_COMMAND_FORWARD_RIGHT_CODES[] = { 377280, 1183, 3 };
const long IR_COMMAND_BACKWARD_LEFT_CODES[] = { 377280, 5263, 9 };
const long IR_COMMAND_BACKWARD_RIGHT_CODES[] = { 377278, 8943, 7 };
const long IR_COMMAND_STOP_CODES[] = { 377281, 3423, 5 };
const long IR_COMMAND_VERY_SLOW_CODES[] = { 377280, 3223, 40 };
const long IR_COMMAND_SLOW_CODES[] = {377281, 9543, 43 };
const long IR_COMMAND_FAST_CODES[] = { 377278, 6903, 26 };
const long IR_COMMAND_VERY_FAST_CODES[] = { 377279, 0473, 27 };
-
А что вам непонятно? 0 перед числом говорит, что это число — в восьмеричной системе счисления, а там, как известно, нет цифры 8.
0x перед числом — говорит, что это число в шестнадцатеричной системе счисления.
Короче — уберите 0 спереди у чисел 0783 и 0473 — они там не нужны.
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Cplusplus
Posts
r/Cplusplus
1
Posted by7 years ago
here is the code: if (airc == 08) { grid[0][7] == ‘A’ ;}
any help is much appreciated!
2 comments
100% Upvoted
level 1
· 7 yr. ago
An integer literal with a leading zero is interpreted as a value in octal (base 8.) As such it can only contain the digits zero through seven. Remove the leading zero.
7
level 2
Op · 7 yr. ago
ok thank you!
1
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Recommended Answers
I’m taking the time from an accessor function and if it’s from 0-9, so it displays correctly the hour time position, I have the following statements in my main body:
if (clock1.getHour() == 00) cout<<"The hour of clock1 is 00"<<endl; else if (clock1.getHour() == 01) cout<<"The hour of …
Jump to Post
No, all of the 0’s in the lines are all 0’s, I double checked. At no time did I declare octal constants. My goal is basically to get it to print out 08, 09 for the hour parameter without converting it to a string.
Thanks though, I made 010 for …
Jump to Post
All 5 Replies
VernonDozier
2,218
Posting Expert
Featured Poster
14 Years Ago
I’m taking the time from an accessor function and if it’s from 0-9, so it displays correctly the hour time position, I have the following statements in my main body:
if (clock1.getHour() == 00) cout<<"The hour of clock1 is 00"<<endl; else if (clock1.getHour() == 01) cout<<"The hour of clock1 is 01"<<endl; else if (clock1.getHour() == 02) cout<<"The hour of clock1 is 03"<<endl; ... ... .... ... else if (clock1.getHour() == 08) cout<<"The hour of clock1 is 08"<<endl; else if(clock1.getHour() == 09) cout<<"The hour of clock1 is 09"<<endl; else cout<<"The hour of clock1 is "<<clock1.getHour()<<endl;This works great and it displays, except when I get to 8 and 9. I get two errors, invalid digit «8» & «9» in octal constant. They also don’t appear in purple as the rest of the ints do in else if statements, just black.
The syntax is exactly the same as the rest of the statements. I don’t get why it would all of the sudden act up now. If I comment them out, it runs.
Thanks.
Well if it’s an octal constant, then the only valid digits are 0 though 7, so O8 is illegal since 8 isn’t an octal digit. Do you want octal constants? Is that a typo : is it supposed to be the number 0 rather than the letter O, which stands for Octal base in this context? Why not just make it:
else if (clock1.getHour() == 8)If you want the above statement in octal, i guess it would be:
else if (clock1.getHour() == O10)since O10 is the equivalent of 8. Do you have the letter O in there on purpose?
14 Years Ago
No, all of the 0’s in the lines are all 0’s, I double checked. At no time did I declare octal constants. My goal is basically to get it to print out 08, 09 for the hour parameter without converting it to a string.
Thanks though, I made 010 for 8 and 011 for 9 and is correctly displaying 08 and 09 for the hour position.
VernonDozier
2,218
Posting Expert
Featured Poster
14 Years Ago
No, all of the 0’s in the lines are all 0’s, I double checked. At no time did I declare octal constants. My goal is basically to get it to print out 08, 09 for the hour parameter without converting it to a string.
Thanks though, I made 010 for 8 and 011 for 9 and is correctly displaying 08 and 09 for the hour position.
Hmm, I just cut and pasted your code again and you’re right, they are zeroes in your code, not the letter O. Maybe I copied and pasted wrong last time or typed in the letter O without realizing it last time. I’m not sure. The error suggests that there was a letter O in there somewhere, not a zero. I don’t know how you would get the error otherwise and if you go back and forth changing from the letter O o a zero and vice versa, it will compile successfully or not based on that. Not sure what the deal is, but if it works now, great.
dougy83
74
Posting Whiz in Training
14 Years Ago
In C/C++, octal numbers are prefixed with 0 (zero), in the same manner as hexadecimal numbers are prefixed with 0x (zero, ex).
Using the letter O (oh) does not specify an octal digit, but will be an (undefined) variable name.
I believe the answer to the OP’s question is to get rid of all zeros preceeding any number, so that it is read as decimal and not octal.
VernonDozier
2,218
Posting Expert
Featured Poster
14 Years Ago
In C/C++, octal numbers are prefixed with 0 (zero), in the same manner as hexadecimal numbers are prefixed with 0x (zero, ex).
Using the letter O (oh) does not specify an octal digit, but will be an (undefined) variable name.
I believe the answer to the OP’s question is to get rid of all zeros preceeding any number, so that it is read as decimal and not octal.
You’re right dougy. I’m embarrassed. I forgot that and wasn’t really paying attention and posted and got the letter O and number 0 completely backwards! Twice!
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int arr[20][20] = {
{08,02,22,97,38,15,00,40,00,75,04,05,07,78,52,12,50,77,91,08},
{49,49,99,40,17,81,18,57,60,87,17,40,98,43,69,48,04,56,62,00},
{81,49,31,73,55,79,14,29,93,71,40,67,53,88,30,03,49,13,36,65},
{52,70,95,23,04,60,11,42,69,24,68,56,01,32,56,71,37,02,36,91},
{22,31,16,71,51,67,63,89,41,92,36,54,22,40,40,28,66,33,13,80},
{24,47,32,60,99,03,45,02,44,75,33,53,78,36,84,20,35,17,12,50},
{32,98,81,28,64,23,67,10,26,38,40,67,59,54,70,66,18,38,64,70},
{67,26,20,68,02,62,12,20,95,63,94,39,63,08,40,91,66,49,94,21},
{24,55,58,05,66,73,99,26,97,17,78,78,96,83,14,88,34,89,63,72},
{21,36,23,09,75,00,76,44,20,45,35,14,00,61,33,97,34,31,33,95},
{78,17,53,28,22,75,31,67,15,94,03,80,04,62,16,14,09,53,56,92},
{16,39,05,42,96,35,31,47,55,58,88,24,00,17,54,24,36,29,85,57},
{86,56,00,48,35,71,89,07,05,44,44,37,44,60,21,58,51,54,17,58},
{19,80,81,68,05,94,47,69,28,73,92,13,86,52,17,77,04,89,55,40},
{04,52,08,83,97,35,99,16,07,97,57,32,16,26,26,79,33,27,98,66},
{88,36,68,87,57,62,20,72,03,46,33,67,46,55,12,32,63,93,53,69},
{04,42,16,73,38,25,39,11,24,94,72,18,08,46,29,32,40,62,76,36},
{20,69,36,41,72,30,23,88,34,62,99,69,82,67,59,85,74,04,36,16},
{20,73,35,29,78,31,90,01,74,31,49,71,48,86,81,16,23,57,05,54},
{01,70,54,71,83,51,54,69,16,92,33,48,61,43,52,01,89,19,67,48}
};
Я получаю следующую ошибку
q11.c:8:10: error: invalid digit "8" in octal constant
q11.c:8:67: error: invalid digit "8" in octal constant
q11.c:15:49: error: invalid digit "8" in octal constant
q11.c:17:19: error: invalid digit "9" in octal constant
q11.c:18:58: error: invalid digit "9" in octal constant
q11.c:22:16: error: invalid digit "8" in octal constant
q11.c:24:46: error: invalid digit "8" in octal constant
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Error compilation «invalid digit «8» in octal constant»