Episode 4: Slides

3 files changed, 68 insertions, 20 deletions

diff --git a/README.md b/README.md
index 5a4e8ec..85092c9 100644
--- a/README.md
+++ b/README.md
@@ -17,14 +17,9 @@ We tell the computer what to do.
 Topics
 
 * variables
-
-
-
 * statements/expressions
 * looping
 
-
-
 "mo"
 
   -------
@@ -146,3 +141,44 @@ OR
 | 0 | 1 | 1      |
 | 1 | 0 | 1      |
 | 1 | 1 | 1      |
+
+
+* functions: behaviour
+* structs: data
+
+
+code + data = programming
+
+
+allocation a variable -> stack
+
+
+
+* pass by value
+
+ x -> clone -> x1
+
+(x1)
+ \x1\
+  \x1\
+   \x1\
+    (x1 * 2)
+     -
+
+* pass by reference
+
+ `*x`
+(x)
+ \x\
+  \x\
+   \ \
+    ( )
+     -
+
+Workbench
+
+* text editor (vscode, emacs, vim, nano, textmate)
+* compiler toolchain
+  * GNU: gcc
+  * LLVM: clang
+* terminal:
diff --git a/main.c b/main.c
index ad5174c..83bf64d 100644
--- a/main.c
+++ b/main.c
@@ -2,22 +2,27 @@
 #include <string.h>
 #include <stdlib.h>
 
+typedef struct {
+  int age;
+  int happiness; // 0 sad, 100 happy
+} Person;
+
+void slide(Person *person)
+{
+  person->happiness += 10;
+}
+
+// pass by value
+// pass by reference
 int main(int argc, char *argv[])
 {
-  // AND &&
-  // OR ||
-  //
-  int age = 30;
+  Person *mo = malloc(sizeof(Person));
+  mo->age = 36;
+  mo->happiness = 70;
 
-  if (/* */)
-  {
-    printf("Fly to Hawaii\n");
-  }
-  else
-  {
-    printf("Camp in the back yard\n");
-  }
-}
+  printf("Before: age(%d), happiness(%d)\n", mo->age, mo->happiness);
+
+  slide(mo);
 
-// 1. compile: c -> machine
-// 2. run: machine -> os
+  printf("After: age(%d), happiness(%d)\n", mo->age, mo->happiness);
+}
diff --git a/main.js b/main.js
new file mode 100644
index 0000000..949b379
--- /dev/null
+++ b/main.js
@@ -0,0 +1,7 @@
+function main() {
+  let person = { age: 30 };
+
+  function slide(person) {
+    person.age = 100;
+  }
+}