Compilare: main.cpp: In function 'void Main()': main.cpp:60:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &d, &l, &u, &r); --d; --l; ^ main.cpp: In function 'int main()': main.cpp:70:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("xor.in", "r", stdin); ^ main.cpp:71:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("xor.out", "w", stdout); ^ main.cpp:73:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &nTest, &mod); ^