Compilare: user.cpp: In function ‘int main()’: user.cpp:12:13: warning: unused variable ‘nr’ [-Wunused-variable] int i,j,nr=0,i1,j1,s,maxim; ^ user.cpp:12:21: warning: unused variable ‘j1’ [-Wunused-variable] int i,j,nr=0,i1,j1,s,maxim; ^ user.cpp:13:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc13.in","r",stdin); ^ user.cpp:14:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc13.out","w",stdout); ^ user.cpp:15:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:19:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[j][i]); ^