Compilare: user.cpp: In function ‘int main()’: user.cpp:13:9: warning: unused variable ‘cur’ [-Wunused-variable] int cur,n,i,j,ok,sum=0,nr,k,kl[4]= {0,0,1,1},kc[4]= {0,1,0,1},l,d[4]; ^ user.cpp:13:19: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int cur,n,i,j,ok,sum=0,nr,k,kl[4]= {0,0,1,1},kc[4]= {0,1,0,1},l,d[4]; ^ user.cpp:13:69: warning: unused variable ‘d’ [-Wunused-variable] int cur,n,i,j,ok,sum=0,nr,k,kl[4]= {0,0,1,1},kc[4]= {0,1,0,1},l,d[4]; ^ user.cpp:20:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:22:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&y[i]); ^