Compilare: user.cpp: In function ‘void cit(int&)’: user.cpp:42: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:49: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void readdata()’: user.cpp:55: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void buildtree()’: user.cpp:97: warning: unused variable ‘p’ user.cpp: In function ‘void compute(int*, int*, int*, int*, int, int*)’: user.cpp:195: warning: unused variable ‘p’ user.cpp: In function ‘void outputdata()’: user.cpp:254: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int locate(int*, int)’: user.cpp:128: warning: ‘poz’ may be used uninitialized in this function