Compilare: user.cpp: In function ‘int main()’: user.cpp:8:22: warning: unused variable ‘nr’ [-Wunused-variable] int n = 0, r, d, nr, s2 = 0, s3 = 0, s5 = 0; ^ user.cpp:6:37: 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:7:39: 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:9:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &r, &d); ^