long int not being declared properly [C++]

Question

Here's the piece of code

long int lValue = 9999999999999; cout << lValue << endl;

I am running it on Eclipse IDE for C/C++, using MinGW compiler.

I have include the #include <limits.h> properly and other sort of short and unsigned int are being compiled and showing a value properly.

But while running this long int value, I am getting the following value. 1316134911 instead of the original value, I tried it with different values but each time it's getting a random value. Any more details required? let me know, thanks in advance!

On that platform long int is the same as int. You need long long ... 9999999999999LL See also stackoverflow.com/questions/586118/… — JSF
– JSF, Commented Dec 10, 2015 at 16:07
Following JSF's comment about platform, it works on coliru: coliru.stacked-crooked.com/a/02642435a6f6e598 (gcc), and coliru.stacked-crooked.com/a/8345410f21e2c7b4 (clang) — AndyG
– AndyG, Commented Dec 10, 2015 at 16:09

Martin Bonner supports Monica · Accepted Answer · 2015-12-10 17:17:29Z

You need to use long long if you want to store 64 bits (and you do).

 const auto lValue = 9999999999999LL;

or

 long long lValue = 9999999999999LL;

Edward Strange · Accepted Answer · 2015-12-10 16:03:01Z

1

Add a L to the end of your 9's.

answered Dec 10, 2015 at 16:03

Edward Strange

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6 Comments

Saw Over a year ago

The same value is being generated.

Freddy Over a year ago

@Saw do you have any optimization flags enabled when compiling?

Saw Over a year ago

@Freddy none as of I know, I am new to Eclipse. Can you please route me to the location on how I can find this optimization flags?

Simple Over a year ago

LL will be a long long, which is always at least 64 bits. L is long which is 64 bits on Linux but 32 bits on Windows.

user4581301 Over a year ago

Why can't we all just get a long?

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