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content/notes/08-intro-to-c.md
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@ -20,7 +20,7 @@ Developed 1972 for Unix
> “C is an imperative procedural language supporting structured programming, lexical variable scope, and recursion, with a static type system. It was designed to be compiled to provide low-level access to memory and language constructs that map efficiently to machine instructions, all with minimal runtime support. Despite its low-level capabilities, the language was designed to encourage cross-platform programming. A standards-compliant C program written with portability in mind can be compiled for a wide variety of computer platforms and operating systems with few changes to its source code.” - wikipedia > “C is an imperative procedural language supporting structured programming, lexical variable scope, and recursion, with a static type system. It was designed to be compiled to provide low-level access to memory and language constructs that map efficiently to machine instructions, all with minimal runtime support. Despite its low-level capabilities, the language was designed to encourage cross-platform programming. A standards-compliant C program written with portability in mind can be compiled for a wide variety of computer platforms and operating systems with few changes to its source code.” - wikipedia
``` ``` c
#include <stdio.h> #include <stdio.h>
int main(int argc, const char *argv[]) int main(int argc, const char *argv[])
@ -37,7 +37,7 @@ java uses .class files, C uses .c and .h
java uses `import`, C uses `#include` java uses `import`, C uses `#include`
``` ``` c
#include <stdio.h> #include <stdio.h>
#include "myfile.h" #include "myfile.h"
``` ```
@ -46,7 +46,7 @@ java uses `import`, C uses `#include`
- in `hello_world.c` we include `stdio.h` so we can call `puts()` - in `hello_world.c` we include `stdio.h` so we can call `puts()`
# Routines # Routines
``` ``` c
int main(int argc, const char *argv[]) int main(int argc, const char *argv[])
{ {
@ -57,7 +57,6 @@ routines can be scoped to just the source code file
- `statis int eleven(void` - `statis int eleven(void`
routines must be declared bfore being used routines must be declared bfore being used
- `extern int eleven(void)` - `extern int eleven(void):`
# If statements
# if, const, for, while, do, case etc same as java