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Fix spelling and other small issues

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Nick Ward 2014-06-28 11:53:25 +10:00
parent 2597370686
commit 104b9add58
1 changed files with 15 additions and 15 deletions
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@ -23,7 +23,7 @@ Multi-line comments look like this. They work in C89 as well.
// Constants: #define <keyword> // Constants: #define <keyword>
#define DAYS_IN_YEAR 365 #define DAYS_IN_YEAR 365
//enumeration constants are also ways to declare constants. // Enumeration constants are also ways to declare constants.
enum days {SUN = 1, MON, TUE, WED, THU, FRI, SAT}; enum days {SUN = 1, MON, TUE, WED, THU, FRI, SAT};
// MON gets 2 automatically, TUE gets 3, etc. // MON gets 2 automatically, TUE gets 3, etc.
@ -96,7 +96,7 @@ int main() {
// is not evaluated (except VLAs (see below)). // is not evaluated (except VLAs (see below)).
// The value it yields in this case is a compile-time constant. // The value it yields in this case is a compile-time constant.
int a = 1; int a = 1;
// size_t is an unsiged integer type of at least 2 bytes used to represent // size_t is an unsigned integer type of at least 2 bytes used to represent
// the size of an object. // the size of an object.
size_t size = sizeof(a++); // a++ is not evaluated size_t size = sizeof(a++); // a++ is not evaluated
printf("sizeof(a++) = %zu where a = %d\n", size, a); printf("sizeof(a++) = %zu where a = %d\n", size, a);
@ -135,9 +135,9 @@ int main() {
// > Enter the array size: 10 // > Enter the array size: 10
// > sizeof array = 40 // > sizeof array = 40
// Strings are just arrays of chars terminated by a NUL (0x00) byte, // Strings are just arrays of chars terminated by a NULL (0x00) byte,
// represented in strings as the special character '\0'. // represented in strings as the special character '\0'.
// (We don't have to include the NUL byte in string literals; the compiler // (We don't have to include the NULL byte in string literals; the compiler
// inserts it at the end of the array for us.) // inserts it at the end of the array for us.)
char a_string[20] = "This is a string"; char a_string[20] = "This is a string";
printf("%s\n", a_string); // %s formats a string printf("%s\n", a_string); // %s formats a string
@ -182,7 +182,7 @@ int main() {
11 % 3; // => 2 11 % 3; // => 2
// Comparison operators are probably familiar, but // Comparison operators are probably familiar, but
// there is no boolean type in c. We use ints instead. // there is no Boolean type in c. We use ints instead.
// (Or _Bool or bool in C99.) // (Or _Bool or bool in C99.)
// 0 is false, anything else is true. (The comparison // 0 is false, anything else is true. (The comparison
// operators always yield 0 or 1.) // operators always yield 0 or 1.)
@ -281,7 +281,7 @@ int main() {
// branching with multiple choices: switch() // branching with multiple choices: switch()
switch (some_integral_expression) { switch (some_integral_expression) {
case 0: // labels need to be integral *constant* epxressions case 0: // labels need to be integral *constant* expressions
do_stuff(); do_stuff();
break; // if you don't break, control flow falls over labels break; // if you don't break, control flow falls over labels
case 1: case 1:
@ -312,7 +312,7 @@ int main() {
// Types will overflow without warning // Types will overflow without warning
printf("%d\n", (unsigned char) 257); // => 1 (Max char = 255 if char is 8 bits long) printf("%d\n", (unsigned char) 257); // => 1 (Max char = 255 if char is 8 bits long)
// For determining the max value of a `char`, a `signed char` and an `unisigned char`, // For determining the max value of a `char`, a `signed char` and an `unsigned char`,
// respectively, use the CHAR_MAX, SCHAR_MAX and UCHAR_MAX macros from <limits.h> // respectively, use the CHAR_MAX, SCHAR_MAX and UCHAR_MAX macros from <limits.h>
// Integral types can be cast to floating-point types, and vice-versa. // Integral types can be cast to floating-point types, and vice-versa.
@ -342,13 +342,13 @@ int main() {
// => Prints "8, 4" on a typical 64-bit system // => Prints "8, 4" on a typical 64-bit system
// To retrieve the value at the address a pointer is pointing to, // To retrieve the value at the address a pointer is pointing to,
// put * in front to de-reference it. // put * in front to dereference it.
// Note: yes, it may be confusing that '*' is used for _both_ declaring a // Note: yes, it may be confusing that '*' is used for _both_ declaring a
// pointer and dereferencing it. // pointer and dereferencing it.
printf("%d\n", *px); // => Prints 0, the value of x printf("%d\n", *px); // => Prints 0, the value of x
// You can also change the value the pointer is pointing to. // You can also change the value the pointer is pointing to.
// We'll have to wrap the de-reference in parenthesis because // We'll have to wrap the dereference in parenthesis because
// ++ has a higher precedence than *. // ++ has a higher precedence than *.
(*px)++; // Increment the value px is pointing to by 1 (*px)++; // Increment the value px is pointing to by 1
printf("%d\n", *px); // => Prints 1 printf("%d\n", *px); // => Prints 1
@ -567,7 +567,7 @@ typedef void (*my_fnp_type)(char *);
'\f' // new page (form feed) '\f' // new page (form feed)
'\r' // carriage return '\r' // carriage return
'\b' // backspace character '\b' // backspace character
'\0' // null character. Usually put at end of strings in C lang. '\0' // NULL character. Usually put at end of strings in C.
// hello\n\0. \0 used by convention to mark end of string. // hello\n\0. \0 used by convention to mark end of string.
'\\' // backslash '\\' // backslash
'\?' // question mark '\?' // question mark
@ -586,7 +586,7 @@ typedef void (*my_fnp_type)(char *);
"%7.4s" // (can do with strings too) "%7.4s" // (can do with strings too)
"%c" // char "%c" // char
"%p" // pointer "%p" // pointer
"%x" // hexidecimal "%x" // hexadecimal
"%o" // octal "%o" // octal
"%%" // prints % "%%" // prints %
@ -628,7 +628,7 @@ If you have a question, read the [compl.lang.c Frequently Asked Questions](http:
It's very important to use proper spacing, indentation and to be consistent with your coding style in general. It's very important to use proper spacing, indentation and to be consistent with your coding style in general.
Readable code is better than clever code and fast code. For a good, sane coding style to adopt, see the Readable code is better than clever code and fast code. For a good, sane coding style to adopt, see the
[Linux kernel coding stlye](https://www.kernel.org/doc/Documentation/CodingStyle). [Linux kernel coding style](https://www.kernel.org/doc/Documentation/CodingStyle).
Other than that, Google is your friend. Other than that, Google is your friend.