Compilare: user.cpp: In function ‘int main()’: user.cpp:81: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘long int med()’: user.cpp:76: warning: control reaches end of non-void function user.cpp: In function ‘long int secv()’: user.cpp:54: warning: control reaches end of non-void function user.cpp: In function ‘long int med()’: user.cpp:57: warning: ‘k’ may be used uninitialized in this function user.cpp: In function ‘long int secv()’: user.cpp:29: warning: ‘k’ may be used uninitialized in this function