Compilare: user.cpp: In function ‘int main()’: user.cpp:13: warning: format ‘%u’ expects type ‘unsigned int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:14: warning: format ‘%u’ expects type ‘unsigned int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:16: warning: format ‘%u’ expects type ‘unsigned int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:11: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:12: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:13: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:14: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:16: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result