Compilare: main.cpp: In function 'int main()': main.cpp:50:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("culoar.in", "r", stdin); ^ main.cpp:51:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("culoar.out", "w", stdout); ^ main.cpp: In function 'double solve(double, double, int, int)': main.cpp:45:21: warning: 'sang' may be used uninitialized in this function [-Wmaybe-uninitialized] return solve(sang - stp, sang + stp, cnt + 1, n); ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~