Compilare: user.cpp: In function ‘int main()’: user.cpp:25:9: warning: unused variable ‘cnt2’ [-Wunused-variable] int cnt2 = 0, cnt3 = 0, cnt5 = 0, res = 0; ^ user.cpp:25:19: warning: unused variable ‘cnt3’ [-Wunused-variable] int cnt2 = 0, cnt3 = 0, cnt5 = 0, res = 0; ^ user.cpp:25:29: warning: unused variable ‘cnt5’ [-Wunused-variable] int cnt2 = 0, cnt3 = 0, cnt5 = 0, res = 0; ^ user.cpp:21:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pascal.in", "r", stdin); ^ user.cpp:22:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pascal.out", "w", stdout); ^ user.cpp:23:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &r, &d); ^