Compilare: user.cpp: In function ‘void preproc()’: user.cpp:45:6: warning: unused variable ‘k’ [-Wunused-variable] int k, timp = 0; ^ user.cpp: In function ‘int main()’: user.cpp:67:6: warning: unused variable ‘k’ [-Wunused-variable] int k, a, b; ^ user.cpp:65:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("minuni.in", "r", stdin); ^ user.cpp:66:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("minuni.out", "w", stdout); ^ user.cpp:68:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &m); ^ user.cpp:70:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &a, &b); ^