Compilare: user.cpp: In function ‘int main()’: user.cpp:28:18: warning: unused variable ‘p’ [-Wunused-variable] int n,m,k,i,j,p,val,maxl,maxc,ans,pl,pc,l1,l2,c1,c2; ^ user.cpp:32:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&n,&m,&k); ^ user.cpp:35:82: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d %d %d " ,&Q[i].l1,&Q[i].c1,&Q[i].l2,&Q[i].c2,&Q[i].val); ^