Compilare: main.cpp: In function 'double segDistance(std::pair<double, double>, std::pair<double, double>, std::pair<double, double>)': main.cpp:13:9: warning: unused variable 'aux' [-Wunused-variable] double aux = abs(a * x0 + b * y0 + c) / sqrt(a * a + b * b); ^~~ main.cpp: In function 'int main()': main.cpp:23:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pisica.in", "r", stdin); ^ main.cpp:24:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pisica.out", "w", stdout); ^