Compilare: main.cpp: In function 'int poop(int, int)': main.cpp:93:13: warning: unused variable 'x' [-Wunused-variable] int x = i - ix ; ^ main.cpp:94:13: warning: unused variable 'y' [-Wunused-variable] int y = val ; ^ main.cpp: In function 'int main()': main.cpp:161:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lcdr.in" , "r" , stdin) ; ^ main.cpp:162:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lcdr.out" , "w" , stdout) ; ^