Compilare: user.cpp: In function ‘int main()’: user.cpp:68:21: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] while(l[pas]<6&!ok) ^ user.cpp:48:35: 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:49:37: 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:50:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&val,&n1,&n2,&n3); ^ user.cpp:51:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n1;i++) scanf("%d",&v[1][i][0]); ^ user.cpp:52:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n2;i++) scanf("%d",&v[2][i][0]); ^ user.cpp:53:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n3;i++) scanf("%d",&v[3][i][0]); ^