/tutorial/cecil/integer/example.e

 1class EXAMPLE
 2   --
 3   -- The Eiffel program is running first, then calls the C program, which is in charge of adding
 4   -- two INTEGERs using the infix "+" feature of class INTEGER.
 5   --
 6   -- To compile this example, use command:
 7   --
 8   --  se c -cecil cecil.se example c_prog.c
 9   --
10
11create {ANY}
12   make
13
14feature {ANY}
15   make
16      local
17         i1, i2, sum: INTEGER
18      do
19         i1 := 2
20         i2 := 3
21         io.put_integer(i1)
22         io.put_string(" + ")
23         io.put_integer(i2)
24         io.put_string(" = ")
25         sum := call_c_prog(i1, i2)
26         io.put_integer(sum)
27         io.put_string("%N")
28      end
29
30feature {}
31   call_c_prog (i1, i2: INTEGER): INTEGER
32      external "C"
33      alias "c_prog"
34      end
35
36end -- class EXAMPLE