Compilare: user.cpp: In function ‘int main()’: user.cpp:13:15: warning: unused variable ‘a’ [-Wunused-variable] int c, n, a, b, total = 0; ^ user.cpp:13:18: warning: unused variable ‘b’ [-Wunused-variable] int c, n, a, b, total = 0; ^ user.cpp:13:21: warning: unused variable ‘total’ [-Wunused-variable] int c, n, a, b, total = 0; ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rafturi.in", "r", stdin); ^ user.cpp:11:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rafturi.out", "w", stdout); ^ user.cpp:14:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &c, &n); ^ user.cpp:18:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^