Compilare: user.cpp: In function ‘int main()’: user.cpp:36:37: warning: operation on ‘z’ may be undefined [-Wsequence-point] a[++z]=0LL+a[z-2]+a[z-1]; ^ user.cpp:36:37: warning: operation on ‘z’ may be undefined [-Wsequence-point] user.cpp:45:40: warning: operation on ‘z’ may be undefined [-Wsequence-point] while(k>n){a[++z]=a[z-3]+a[z-2];k--;} ^ user.cpp:45:40: warning: operation on ‘z’ may be undefined [-Wsequence-point] user.cpp:8:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi5.in","r",stdin); ^ user.cpp:9:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi5.out","w",stdout); ^ user.cpp:10:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&p,&n,&k); ^ user.cpp:12:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&a[i]); ^