Compilare: user.cpp: In function ‘void Read()’: user.cpp:40:25: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[255]’ [-Wformat=] fscanf(fin, "%s", &s); ^ user.cpp:47:33: warning: NULL used in arithmetic [-Wpointer-arith] for (int i = 0; s[i] != NULL; i++) ^ user.cpp:65:29: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[255]’ [-Wformat=] fscanf(fin, "%s", &s); ^ user.cpp:37:9: warning: unused variable ‘inv’ [-Wunused-variable] int inv, cop, nn, nr; ^ user.cpp:37:14: warning: unused variable ‘cop’ [-Wunused-variable] int inv, cop, nn, nr; ^ user.cpp:37:23: warning: unused variable ‘nr’ [-Wunused-variable] int inv, cop, nn, nr; ^ user.cpp:40:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", &s); ^ user.cpp:65:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", &s); ^