Compilare: user.cpp: In function ‘void read_data()’: user.cpp:10: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:11: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int find(char*, char*)’: user.cpp:37: warning: unused variable ‘pos’ user.cpp: In function ‘int main()’: user.cpp:58: warning: unused variable ‘p’