Compilare: user.cpp: In function ‘int phii()’: user.cpp:17:11: warning: unused variable ‘i’ [-Wunused-variable] int k,i,m; ^ user.cpp: In function ‘int invers(int)’: user.cpp:27:11: warning: unused variable ‘i’ [-Wunused-variable] int k,i,m; ^ user.cpp: In function ‘void combinare()’: user.cpp:37:11: warning: unused variable ‘i’ [-Wunused-variable] int k,i,m; ^ user.cpp: In function ‘int main()’: user.cpp:53:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("flori4.in","r",stdin); ^ user.cpp:54:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("flori4.out","w",stdout); ^ user.cpp:55:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^