Compilare: user.cpp: In function ‘int main()’: user.cpp:22:81: warning: variable ‘diag’ set but not used [-Wunused-but-set-variable] int maxx=0 ,unic=0 , x ,cate=1 ,n ,i ,j,cnt ,sum ,lin ,col ,bloc=0 ,sumnr ,diag; ^ user.cpp:25:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin ,"%d" ,&n); ^ user.cpp:28:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin ,"%d" ,&v[i]); ^ user.cpp:103:36: warning: ‘col’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(bloc==1 && cnt==lin && col==sum) fprintf(fout ,"%d " ,v[i]); ^ user.cpp:103:30: warning: ‘lin’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(bloc==1 && cnt==lin && col==sum) fprintf(fout ,"%d " ,v[i]); ^