Compilare: user.cpp: In function ‘int main()’: user.cpp:27: warning: format ‘%s’ expects type ‘char*’, but argument 3 has type ‘char (*)[20001]’ user.cpp:27: warning: format ‘%s’ expects type ‘char*’, but argument 4 has type ‘char (*)[20001]’ user.cpp:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:21: warning: ‘l’ may be used uninitialized in this function