Compilare: main.cpp: In function 'void c2()': main.cpp:80:6: warning: unused variable 'dmax' [-Wunused-variable] int dmax = 0; ^~~~ main.cpp: In function 'int main()': main.cpp:133:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dragoni.in", "r", stdin); ^ main.cpp:134:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dragoni.out", "w", stdout); ^