From 3d0687027a450d1778e6f7336f96962fa385ec53 Mon Sep 17 00:00:00 2001 From: Joe Savage Date: Sat, 29 Aug 2015 11:44:41 +0100 Subject: add missing semicolons in c.html.markdown --- c.html.markdown | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'c.html.markdown') diff --git a/c.html.markdown b/c.html.markdown index d3f20eda..e2e15620 100644 --- a/c.html.markdown +++ b/c.html.markdown @@ -183,8 +183,8 @@ int main() { i1 / i2; // => 0 (0.5, but truncated towards 0) // You need to cast at least one integer to float to get a floating-point result - (float)i1 / i2 // => 0.5f - i1 / (double)i2 // => 0.5 // Same with double + (float)i1 / i2; // => 0.5f + i1 / (double)i2; // => 0.5 // Same with double f1 / f2; // => 0.5, plus or minus epsilon // Floating-point numbers and calculations are not exact -- cgit v1.2.3 From 85d80b9e5d8a124d00322f5228e5be64cd97c8ea Mon Sep 17 00:00:00 2001 From: Joe Savage Date: Sat, 29 Aug 2015 11:47:09 +0100 Subject: fix resource capitalisation and add resource to c.html.markdown --- c.html.markdown | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'c.html.markdown') diff --git a/c.html.markdown b/c.html.markdown index e2e15620..09806d93 100644 --- a/c.html.markdown +++ b/c.html.markdown @@ -634,7 +634,7 @@ Best to find yourself a copy of [K&R, aka "The C Programming Language"](https:// It is *the* book about C, written by Dennis Ritchie, the creator of C, and Brian Kernighan. Be careful, though - it's ancient and it contains some inaccuracies (well, ideas that are not considered good anymore) or now-changed practices. -Another good resource is [Learn C the hard way](http://c.learncodethehardway.org/book/). +Other good resources include [Learn C The Hard Way](http://c.learncodethehardway.org/book/) and [SourceCrunch](https://www.sourcecrunch.com/courses/foundations-of-c). If you have a question, read the [compl.lang.c Frequently Asked Questions](http://c-faq.com). -- cgit v1.2.3 From 7cb94b3b85608a73a0200469a8fa897e68f7c991 Mon Sep 17 00:00:00 2001 From: Joe Savage Date: Sat, 29 Aug 2015 11:58:03 +0100 Subject: main() -> main(void) & fix spacing in c.html.markdown --- c.html.markdown | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) (limited to 'c.html.markdown') diff --git a/c.html.markdown b/c.html.markdown index 09806d93..2b087688 100644 --- a/c.html.markdown +++ b/c.html.markdown @@ -18,9 +18,9 @@ memory management and C will take you as far as you need to go. ```c // Single-line comments start with // - only available in C99 and later. - /* +/* Multi-line comments look like this. They work in C89 as well. - */ +*/ /* Multi-line comments don't nest /* Be careful */ // comment ends on this line... @@ -55,7 +55,7 @@ int add_two_ints(int x1, int x2); // function prototype // Your program's entry point is a function called // main with an integer return type. -int main() { +int main(void) { // print output using printf, for "print formatted" // %d is an integer, \n is a newline printf("%d\n", 0); // => Prints 0 @@ -157,12 +157,12 @@ int main() { int cha = 'a'; // fine char chb = 'a'; // fine too (implicit conversion from int to char) - //Multi-dimensional arrays: + // Multi-dimensional arrays: int multi_array[2][5] = { {1, 2, 3, 4, 5}, {6, 7, 8, 9, 0} }; - //access elements: + // access elements: int array_int = multi_array[0][2]; // => 3 /////////////////////////////////////// @@ -219,13 +219,13 @@ int main() { 0 || 1; // => 1 (Logical or) 0 || 0; // => 0 - //Conditional expression ( ? : ) + // Conditional expression ( ? : ) int e = 5; int f = 10; int z; z = (e > f) ? e : f; // => 10 "if e > f return e, else return f." - //Increment and decrement operators: + // Increment and decrement operators: char *s = "iLoveC"; int j = 0; s[j++]; // => "i". Returns the j-th item of s THEN increments value of j. @@ -371,7 +371,7 @@ int main() { x_array[xx] = 20 - xx; } // Initialize x_array to 20, 19, 18,... 2, 1 - // Declare a pointer of type int and initialize it to point to x_array + // Declare a pointer of type int and initialize it to point to x_array int* x_ptr = x_array; // x_ptr now points to the first element in the array (the integer 20). // This works because arrays often decay into pointers to their first element. @@ -404,8 +404,8 @@ int main() { *(my_ptr + xx) = 20 - xx; // my_ptr[xx] = 20-xx } // Initialize memory to 20, 19, 18, 17... 2, 1 (as ints) - // Dereferencing memory that you haven't allocated gives - // "unpredictable results" - the program is said to invoke "undefined behavior" + // Dereferencing memory that you haven't allocated gives + // "unpredictable results" - the program is said to invoke "undefined behavior" printf("%d\n", *(my_ptr + 21)); // => Prints who-knows-what? It may even crash. // When you're done with a malloc'd block of memory, you need to free it, @@ -471,13 +471,13 @@ str_reverse(c); printf("%s\n", c); // => ".tset a si sihT" */ -//if referring to external variables outside function, must use extern keyword. +// if referring to external variables outside function, must use extern keyword. int i = 0; void testFunc() { extern int i; //i here is now using external variable i } -//make external variables private to source file with static: +// make external variables private to source file with static: static int j = 0; //other files using testFunc2() cannot access variable j void testFunc2() { extern int j; -- cgit v1.2.3 From e0d0e9189bb6e0af14a21e0c315922bc16fc2e14 Mon Sep 17 00:00:00 2001 From: Joe Savage Date: Sun, 30 Aug 2015 20:51:23 +0100 Subject: revert additional resource suggestion in c.html.markdown --- c.html.markdown | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'c.html.markdown') diff --git a/c.html.markdown b/c.html.markdown index 2b087688..8e631de4 100644 --- a/c.html.markdown +++ b/c.html.markdown @@ -634,7 +634,7 @@ Best to find yourself a copy of [K&R, aka "The C Programming Language"](https:// It is *the* book about C, written by Dennis Ritchie, the creator of C, and Brian Kernighan. Be careful, though - it's ancient and it contains some inaccuracies (well, ideas that are not considered good anymore) or now-changed practices. -Other good resources include [Learn C The Hard Way](http://c.learncodethehardway.org/book/) and [SourceCrunch](https://www.sourcecrunch.com/courses/foundations-of-c). +Another good resource is [Learn C The Hard Way](http://c.learncodethehardway.org/book/). If you have a question, read the [compl.lang.c Frequently Asked Questions](http://c-faq.com). -- cgit v1.2.3