Compilare: user.cpp: In function ‘cp rec(int)’: user.cpp:10: warning: unused variable ‘d’ user.cpp:10: warning: unused variable ‘in’ user.cpp: In function ‘int main()’: user.cpp:57: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:64: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘cp rec(int)’: user.cpp:10: warning: ‘cn’ may be used uninitialized in this function