Compilare: user.cpp: In function ‘int main()’: user.cpp:49:13: warning: unused variable ‘buf’ [-Wunused-variable] sir buf; ^ user.cpp:21:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&p,&N); ^ user.cpp:30:34: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(buf,MAXBUF,fin); ^ user.cpp:53:37: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(v[i].s,MAXBUF,fin); ^