Compilare: user.cpp: In function ‘void inter(int, int, int, int)’: user.cpp:8: warning: unused variable ‘aux’ user.cpp: In function ‘void read()’: user.cpp:60: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:62: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:74: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:75: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int merge(int*, int, int)’: user.cpp:55: warning: control reaches end of non-void function