In file included from /usr/include/c++/4.4/unordered_map:35, from mijloc.cpp:4: /usr/include/c++/4.4/c++0x_warning.h:31:2: error: #error This file requires compiler and library support for the upcoming ISO C++ standard, C++0x. This support is currently experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options. mijloc.cpp:15: error: expected constructor, destructor, or type conversion before '<' token mijloc.cpp: In function 'void read_data()': mijloc.cpp:25: error: 'h' was not declared in this scope mijloc.cpp:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result mijloc.cpp:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result mijloc.cpp: In function 'int compute(int)': mijloc.cpp:50: error: 'h' was not declared in this scope mijloc.cpp:51: error: 'h' was not declared in this scope mijloc.cpp: In function 'int main()': mijloc.cpp:82: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result mijloc.cpp:83: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result mijloc.cpp:86: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result