Compilare: user.cpp: In function ‘void generare(unsigned int)’: user.cpp:26:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x<=k&&k<=y) v[i]=j; ^ user.cpp:26:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x<=k&&k<=y) v[i]=j; ^ user.cpp: In function ‘int main()’: user.cpp:36:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("summax.in","r",stdin); ^ user.cpp:37:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("summax.out","w",stdout); ^ user.cpp:38:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d",&test,&n,&st,&dr); ^ user.cpp:44:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&nr); ^