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34 
35 #include <stdio.h>
36 
37 #include <sal/main.h>
38 
39 #include <rtl/ustrbuf.hxx>
40 #include <rtl/string.hxx>
41 
42 using rtl::OUString;
43 using rtl::OUStringBuffer;
44 using rtl::OString;
45 
46 SAL_IMPLEMENT_MAIN()
47 {
48     // string concatination
49 
50     sal_Int32 n = 42;
51     double pi = 3.14159;
52 
53     // give it an initial size, should be a good guess.
54     // stringbuffer extends if necessary
55     OUStringBuffer buf( 128 );
56 
57     // append an ascii string
58     buf.appendAscii( "pi ( here " );
59 
60     // numbers can be simply appended
61     buf.append( pi );
62 
63     // lets the compiler count the stringlength, so this is more efficient than
64     // the above appendAscii call, where length of the string must be calculated at
65     // runtime
66     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" ) multiplied with " ) );
67     buf.append( n );
68     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" gives ") );
69     buf.append( (double)( n * pi ) );
70     buf.appendAscii( RTL_CONSTASCII_STRINGPARAM( "." ) );
71 
72     // now transfer the buffer into the string.
73     // afterwards buffer is empty and may be reused again !
74     OUString string = buf.makeStringAndClear();
75 
76     // I could of course also used the OStringBuffer directly
77     OString oString = rtl::OUStringToOString( string , RTL_TEXTENCODING_ASCII_US );
78 
79     // just to print something
80     printf( "%s\n" ,oString.getStr() );
81 
82     return 0;
83 }
84 
85