Compilare: user.cpp: In function ‘int get_last_digit(int, int)’: user.cpp:11:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(num == 4 || num == 9) ^ user.cpp: In function ‘int main()’: user.cpp:34:9: warning: unused variable ‘p’ [-Wunused-variable] int p; ^ user.cpp:30:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cifra.in", "r", stdin); ^ user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cifra.out", "w", stdout); ^ user.cpp:38:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:40:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^