Compilare: user.cpp: In function ‘int main()’: user.cpp:25:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,n,t,k,nr,i1,j1,p,x,con; ^ user.cpp:25:32: warning: unused variable ‘con’ [-Wunused-variable] int i,j,n,t,k,nr,i1,j1,p,x,con; ^ user.cpp:28:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&t); ^ user.cpp:31:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d " ,&n,&k); ^