October 2020
Beginner to intermediate
464 pages
8h 17m
English
Content preview from C Programming For Dummies, 2nd Edition
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Appendix D
Data Types
Standard Data Types
|
Type |
Value Range |
Conversion Character |
|---|---|---|
|
void |
None |
None |
|
_Bool |
0 to 1 |
%d |
|
char |
–128 to 127 |
%c |
|
unsigned char |
0 to 255 |
%u |
|
short int |
–32,768 to 32,767 |
%d |
|
unsigned short int |
0 to 65,535 |
%u |
|
int |
–2,147,483,648 to 2,147,483,647 |
%d |
|
unsigned int |
0 to 4,294,967,295 |
%u |
|
long int |
–2,147,483,648 to 2,147,483,647 |
%ld |
|
unsigned long int |
0 to 4,294,967,295 |
%lu |
|
long long |
-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 |
%lld |
|
unsigned long long |
0 to 18,446,744,073,709,551,615 |
%llu |
|
float |
1.2×10–38 to 3.4×1038 |
%e, %f, %g |
|
Double |
2.3×10–308 to 1.7×10308 |
%e, %f, %g |
|
long double |
3.4×10–4932 to 1.1×104932 |
%e, %f, %g |
The %i placeholder generates integer output, the same as %d. (Think %i for integer, but %d for decimal.)
- The
%xplaceholder outputs integer values in hexadecimal. When%Xis specified, numbers A through F are output in uppercase. - The
%oplaceholder outputs integer values in octal. - Some overlap exists between the size of an int and the size of a long. The ranges depend on how these data types are implemented on a given system.
- The
limits.hheader file lists the sizes of data types. - The size_t defined data type represents bytes in memory. This typedef value is nominally a char, but size_t is used instead of char (or unsigned char). The placeholder to represent this value is
%z, though%zu(unsigned) and%zd(decimal output) are also used.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.