Compilare: user.cpp: In function ‘int main()’: user.cpp:19:14: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> a + 1 >> b + 1; ^ user.cpp:19:23: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> a + 1 >> b + 1; ^ user.cpp:17:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(in, "r", stdin); ^ user.cpp:18:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(out, "w", stdout); ^