Compilare: user.cpp: In function ‘int main()’: user.cpp:30: warning: format ‘%s’ expects type ‘char*’, but argument 3 has type ‘char (*)[20001]’ user.cpp:31: warning: format ‘%s’ expects type ‘char*’, but argument 3 has type ‘char (*)[20001]’ user.cpp:28: warning: unused variable ‘i’ user.cpp:28: warning: unused variable ‘j’ user.cpp:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result