In file included from /usr/include/c++/3.2.2/backward/iostream.h:31, from ikebana.cpp:1: /usr/include/c++/3.2.2/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header. Please consider using one of the 32 headers found in section 17.4.1.2 of the C++ standard. Examples include substituting the <X> header for the <X.h> header for C++ includes, or <sstream> instead of the deprecated header <strstream.h>. To disable this warning use -Wno-deprecated. ikebana.cpp:4: `main' must return `int' ikebana.cpp:4: return type for `main' changed to `int' ikebana.cpp: In function `int main(...)': ikebana.cpp:6: parse error before `>>' token ikebana.cpp:9: `z' undeclared (first use this function) ikebana.cpp:9: (Each undeclared identifier is reported only once for each function it appears in.) ikebana.cpp:9: `y' undeclared (first use this function) ikebana.cpp:12: parse error before `for' ikebana.cpp:12: parse error before `)' token ikebana.cpp:28: parse error at end of input