Compilare: user.cpp: In function ‘int add(int*, int*)’: user.cpp:11:10: warning: no return statement in function returning non-void [-Wreturn-type] a[0]=i-1;} ^ user.cpp: In function ‘int back(int, int, int, int)’: user.cpp:20:44: warning: no return statement in function returning non-void [-Wreturn-type] back(poz+1,max(maxim,cnt+1),cnt+1,cnt2+1);}} ^ user.cpp: In function ‘int mult(int*, int*, int)’: user.cpp:27:10: warning: no return statement in function returning non-void [-Wreturn-type] a[0]=i-1;} ^ user.cpp: In function ‘int main()’: user.cpp:29:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zero.in","r",stdin); ^ user.cpp:30:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zero.out","w",stdout); ^ user.cpp:32:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&l,&b,&p,&q); ^