Compilare: user.cpp: In function ‘int main()’: user.cpp:19: warning: unused variable ‘temp2’ user.cpp:23: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result In file included from /usr/include/string.h:640, from /usr/include/c++/4.4/cstring:45, from user.cpp:3: In function ‘void* memcpy(void*, const void*, size_t)’, inlined from ‘int main()’ at user.cpp:71: /usr/include/bits/string3.h:52: warning: call to void* __builtin___memcpy_chk(void*, const void*, unsigned int, unsigned int) will always overflow destination buffer