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21 
22 
23 
24 #include <stdio.h>
25 
26 #include <sal/main.h>
27 
28 #include <rtl/ustrbuf.hxx>
29 #include <rtl/string.hxx>
30 
31 using rtl::OUString;
32 using rtl::OUStringBuffer;
33 using rtl::OString;
34 
SAL_IMPLEMENT_MAIN()35 SAL_IMPLEMENT_MAIN()
36 {
37     // string concatination
38 
39     sal_Int32 n = 42;
40     double pi = 3.14159;
41 
42     // give it an initial size, should be a good guess.
43     // stringbuffer extends if necessary
44     OUStringBuffer buf( 128 );
45 
46     // append an ascii string
47     buf.appendAscii( "pi ( here " );
48 
49     // numbers can be simply appended
50     buf.append( pi );
51 
52     // lets the compiler count the stringlength, so this is more efficient than
53     // the above appendAscii call, where length of the string must be calculated at
54     // runtime
55     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" ) multiplied with " ) );
56     buf.append( n );
57     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" gives ") );
58     buf.append( (double)( n * pi ) );
59     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM( "." ) );
60 
61     // now transfer the buffer into the string.
62     // afterwards buffer is empty and may be reused again !
63     OUString string = buf.makeStringAndClear();
64 
65     // I could of course also used the OStringBuffer directly
66     OString oString = rtl::OUStringToOString( string , RTL_TEXTENCODING_ASCII_US );
67 
68     // just to print something
69     printf( "%s\n" ,oString.getStr() );
70 
71     return 0;
72 }
73 
74