Compilare: user.cpp: In function ‘void cer2()’: user.cpp:24:69: warning: operation on ‘n’ may be undefined [-Wsequence-point] while(n < k && INT_MAX > a[n] + a[n-1]) a[++n] = a[n-1] + a[n-2]; ^ user.cpp:24:69: warning: operation on ‘n’ may be undefined [-Wsequence-point] user.cpp:20:18: warning: unused variable ‘x’ [-Wunused-variable] long long i, x, z, y; ^ user.cpp:20:21: warning: unused variable ‘z’ [-Wunused-variable] long long i, x, z, y; ^ user.cpp:20:24: warning: unused variable ‘y’ [-Wunused-variable] long long i, x, z, y; ^ user.cpp: In function ‘void cer1()’: user.cpp:12:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x), minn = min(minn, x); ^ user.cpp: In function ‘void cer2()’: user.cpp:22:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &a[i]); ^ user.cpp: In function ‘int main()’: user.cpp:45:40: 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:46:42: 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:47:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld%lld", &v, &n, &k); ^