Compilare: user.cpp: In function ‘void read(int&)’: user.cpp:10:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[255]’ [-Wformat=] fscanf(f1,"%s\n",&s); ^ user.cpp: In function ‘long long int cmmdc(long long int, long long int)’: user.cpp:20:18: warning: unused variable ‘c’ [-Wunused-variable] long long r,c; ^ user.cpp: In function ‘void read(int&)’: user.cpp:10:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%s\n",&s); ^