playground tests: stdio, pointer sizes, arrays

main.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+
+int add(int, int);
+
+int counter = 0;
+
+int main(int argc, char **argv) {
+  printf("hello\n");
+
+  char data[200];
+  char *other_data = "hello";
+
+  char *data_ptr = data;
+
+  printf("size of data: %d\n", sizeof(data));
+  printf("size of data_ptr: %d\n", sizeof(data_ptr));
+  printf("size of other_data: %d\n", sizeof(other_data));
+  printf("size of int: %d\n", sizeof(int));
+  printf("size of char *: %d\n", sizeof(char *));
+
+  add(2, 3);
+
+  extern int counter;
+  printf("global counter: %d\n", counter);
+
+  int c;
+  while((c = getchar()) != EOF) {
+    if (c == 'x') {
+      return 0;
+    }
+    printf("char: %d | ", c);
+    putchar(c);
+    putchar('\n');
+  }
+}
+
+int add(int a, int b) {
+  return a + b;
+}