C

:::c
int a, b;  
int main(int argc, char *argv[]) {  
   hello();  
   return 0;  
}  
void hello(void) {  
   printf("hello world\n");  
}

html

:::html

  
    
  
  
    
hello world
  

ruby

:::ruby
def hello
  puts 'hello world'
end

css21

:::css
html {
  margin: 0;
  padding: 0;
  background-color: #0C7D85;
  line-height: 1.6;
}
body {
  margin: 1em auto 1em auto;
  padding: 1em 2em 2em 1em;
  width: 760px;
  border: 1px solid black;
  background-color: #E8DDCB;
}

sqlite

:::sql
drop table if exists exams;  
create table exams (  
  id          integer       primary key autoincrement,  
  student_id  integer       not null,  -- foreign key
  result      integer       default 0 collate nocase,  
  when        datetime
);  

javascript

:::javascript
for (var i = 0, length = properties.length; i < length; i++) {
  var property = properties[i], value = source[property];
  if (ancestor && Object.isFunction(value) &&
          value.argumentNames().first() == "$super") {
    var method = value, value = Object.extend((function(m) {
          return function() { return ancestor[m].apply(this, arguments) };
        })(property).wrap(method), {
          valueOf:  function() { return method },
          toString: function() { return method.toString() }
        });
  }
  this.prototype[property] = value;
}