more basics + build stuff

CMakeLists.txt

@@ -42,7 +42,10 @@ add_executable( tabtest                 src/tabtest.c               )
 add_executable( umlaut                  src/umlaut.c                )
 add_executable( unary-double-not        src/unary-double-not.c      )
 add_executable( warning                 src/warning.c               )
+add_executable( miniio                 	src/miniio.c               	)
+add_executable( stackoverflow           src/stackoverflow.c         )
 add_executable( pointer-arithmetic      src/pointer-arithmetic.c    )
+add_executable( while-to-do-while       src/while-to-do-while.c     )
 
 target_link_libraries(abc m)    # link libm to abc
 

build.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+cmake . && cmake --build .

src/miniio.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <string.h>
+
+int my_strlen(const char *s) {
+  int len = 0;
+  while (s[len] != 0) {
+      len++;
+  }
+  return len;
+}
+
+int main() {
+  char word[] = "hallo\0"; // not NULL terminated
+
+  printf("word is %d long\n", my_strlen(word));
+  printf("word is actually %lu long\n", strlen(word));
+  printf("success: %b", my_strlen(word) == strlen(word));
+
+  return 0;
+}

src/stackoverflow.c

@@ -0,0 +1,11 @@
+int mem = 0x1337;
+
+void foo() {
+  int buf = 0;
+  foo();
+}
+
+int main() {
+  foo();
+  return 0;
+}

src/while-to-do-while.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+int main() {
+    int init = 5;
+    int i = init;
+    while (i < 10 || i == init) {
+        printf("helo %d\n", i);
+        i++;
+    } 
+    i = init;
+    do {
+        printf("ahelo %d\n", i);
+        i++;
+    } while (i < 10);
+}