Compilare: user.cpp: In function ‘int main()’: user.cpp:21:21: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int n,m,x,y,i,j,nr,p=0; ^ user.cpp:22:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(h,"%d%d",&n,&m); ^ user.cpp:24:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(h,"%d%d",&x,&y); ^