Compilare: user.cpp: In function 'int main()': user.cpp:99: warning: format '%ld' expects type 'long int', but argument 2 has type 'size_t' user.cpp:100: warning: comparison between signed and unsigned integer expressions user.cpp:102: warning: format '%ld' expects type 'long int', but argument 2 has type 'int' user.cpp:102: warning: format '%ld' expects type 'long int', but argument 3 has type 'int'