vault backup: 2022-08-11 11:09:21

content/notes/10-intro-to-c-arrays-malloc-free.md

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+---
+title: "10-intro-to-c-arrays-malloc-free"
+aliases: 
+tags: 
+- cosc204
+---
+
+# Arrays
+- must declare with size
+
+``` c
+uint32_t array[10];
+float matrix[5][6];
+```
+
+- do not have methods
+	- array.size etc
+- not bounds checked
+	- can write past the end
+- to know must keep trach yourself or use sentinel value
+	- 'H' 'e' 'l' 'l' 'o' '\0' <- sentinel value
+
+``` c
+char *check = thing;
+
+while(*check != '\0')
+	check++
+
+length = check - thing
+```