Compilare: user.cpp: In function ‘int main()’: user.cpp:47:14: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] if(lg[1] == lg[2] == lg[3] == 0) ^ user.cpp:47:23: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] if(lg[1] == lg[2] == lg[3] == 0) ^ user.cpp:40:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hanoi2.in", "r", stdin); ^ user.cpp:41:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hanoi2.out", "w", stdout); ^ user.cpp:43:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &d, &lg[1], &lg[2], &lg[3]); ^ user.cpp:46:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i][j]); ^