Compilare: user.cpp: In function ‘void readFile()’: user.cpp:96:9: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int nr; ^ user.cpp:89:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &m); ^ user.cpp:91:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d%d%d\n", &a, &b, &c, &d, &e); ^ user.cpp:93:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, 200000, f); ^