Compilare: user.cpp: In function ‘void read()’: user.cpp:64:30: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[150]’ [-Wformat=] fscanf(fin,"%s", &row); ^ user.cpp:61:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d", &n, &m); ^ user.cpp:64:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s", &row); ^