Compilare: user.cpp: In function ‘int main()’: user.cpp:48:15: warning: unused variable ‘i’ [-Wunused-variable] int t,n,k,i,t1,t2,t3,tc; ^ user.cpp:48:17: warning: unused variable ‘t1’ [-Wunused-variable] int t,n,k,i,t1,t2,t3,tc; ^ user.cpp:48:20: warning: unused variable ‘t2’ [-Wunused-variable] int t,n,k,i,t1,t2,t3,tc; ^ user.cpp:48:23: warning: unused variable ‘t3’ [-Wunused-variable] int t,n,k,i,t1,t2,t3,tc; ^ user.cpp:48:26: warning: unused variable ‘tc’ [-Wunused-variable] int t,n,k,i,t1,t2,t3,tc; ^ user.cpp:51:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&t,&n,&k); ^