In file included from /usr/include/c++/3.2.2/backward/iostream.h:31, from soldati.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. soldati.cpp: In function `int main()': soldati.cpp:38: parse error before `==' token soldati.cpp:21: warning: unused variable `long unsigned int j' soldati.cpp:20: warning: unused variable `bool ok' soldati.cpp: At global scope: soldati.cpp:58: ISO C++ forbids declaration of `system' with no type soldati.cpp:58: `int system' redeclared as different kind of symbol /usr/include/stdlib.h:696: previous declaration of `int system(const char*)' soldati.cpp:58: invalid conversion from `const char*' to `int' soldati.cpp:59: parse error before `return'