integer array element with leading 0 showing garbage output

Question

i have this small piece of code that has an integer array containing some elements with a leading 0.

int arr[]={012,234,071};
cout<<arr[0]<<endl; //output 10
cout<<arr[1]<<endl; //output 234
cout<<arr[2]<<endl; //output 57

for some reason am i getting different output for values with leading zeros,can someone explain this to me why is this happening?

user2100815 · Accepted Answer · 2017-04-03 23:49:14Z

4

Numeric literals with leading zeros are assumed to be octal numbers. Don't use leading zeros.

answered Apr 3, 2017 at 23:49

user2100815

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BusyProgrammer · Accepted Answer · 2017-04-04 00:09:46Z

0

integer array element with leading 0 showing garbage output

You do not get "garbage" values; the compiler mainly interprets the values in your array that have leading zeros, like 012, as octal values. The compiler then converts it into a decimal value (for 012, it is 10) and outputs that.

Don't use leading zeroes if you are working with the decimal system.

edited Apr 4, 2017 at 0:09

answered Apr 3, 2017 at 23:49

BusyProgrammer

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3 Comments

user2100815 Over a year ago

" values in your array that have trailing zeros as octal values." - That would be leading zeros.

BusyProgrammer Over a year ago

@NeilButterworth Sorry for the vocab confusion. I'll fix it, give me a sec :)

BusyProgrammer Over a year ago

@NeilButterworth I've adjusted my answer, could you please remove your above comment? Thanks!

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