[C/en] Added tidbit about fall-though in switch statements.

Another pitfall, as not all languages have fall-through in switches.

1 files changed, 15 insertions, 9 deletions

diff --git a/c.html.markdown b/c.html.markdown
index 3d632eab..2a5e460f 100644
--- a/c.html.markdown
+++ b/c.html.markdown
@@ -76,7 +76,7 @@ int main (int argc, char** argv)
   ///////////////////////////////////////
   // Types
   ///////////////////////////////////////
-  
+
   // All variables MUST be declared at the top of the current block scope
   // we declare them dynamically along the code for the sake of the tutorial
 
@@ -318,6 +318,12 @@ int main (int argc, char** argv)
   case 1:
     printf("Huh, 'a' equals 1!\n");
     break;
+    // Be careful - without a "break", execution continues until the
+    // next "break" is reached.
+  case 3:
+  case 4:
+    printf("Look at that.. 'a' is either 3, or 4\n");
+    break;
   default:
     // if `some_integral_expression` didn't match any of the labels
     fputs("error!\n", stderr);
@@ -345,8 +351,8 @@ int main (int argc, char** argv)
   https://ideone.com/GuPhd6
   this will print out "Error occured at i = 52 & j = 99."
   */
-  
-  
+
+
   ///////////////////////////////////////
   // Typecasting
   ///////////////////////////////////////
@@ -445,7 +451,7 @@ int main (int argc, char** argv)
   for (xx = 0; xx < 20; xx++) {
     *(my_ptr + xx) = 20 - xx; // my_ptr[xx] = 20-xx
   } // Initialize memory to 20, 19, 18, 17... 2, 1 (as ints)
-  
+
   // Note that there is no standard way to get the length of a
   // dynamically allocated array in C. Because of this, if your arrays are
   // going to be passed around your program a lot, you need another variable
@@ -721,13 +727,13 @@ typedef void (*my_fnp_type)(char *);
 
 /******************************* Header Files **********************************
 
-Header files are an important part of c as they allow for the connection of c 
-source files and can simplify code and definitions by seperating them into 
+Header files are an important part of c as they allow for the connection of c
+source files and can simplify code and definitions by seperating them into
 seperate files.
 
-Header files are syntaxtically similar to c source files but reside in ".h" 
-files. They can be included in your c source file by using the precompiler 
-command #include "example.h", given that example.h exists in the same directory 
+Header files are syntaxtically similar to c source files but reside in ".h"
+files. They can be included in your c source file by using the precompiler
+command #include "example.h", given that example.h exists in the same directory
 as the c file.
 */