Compilare: user.cpp: In function ‘int main()’: user.cpp:63:17: warning: unused variable ‘sum’ [-Wunused-variable] int n,x,i,j,sum; ^ user.cpp:64:12: warning: unused variable ‘inv’ [-Wunused-variable] double inv; ^ user.cpp:61:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("partitionare.in","r",stdin); ^ user.cpp:62:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("partitionare.out","w",stdout); ^ user.cpp:65:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^