livada1.cpp: In function 'void citeste(int&)': livada1.cpp:11: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result livada1.cpp:19: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result livada1.cpp: In function 'int main()': livada1.cpp:25: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result livada1.cpp:26: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result livada1.cpp:28: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result livada1.cpp:27: warning: 'elem' may be used uninitialized in this function livada1.cpp:27: warning: 'nrap' may be used uninitialized in this function