Compilare: user.cpp: In function ‘int main()’: user.cpp:14:19: warning: unused variable ‘z’ [-Wunused-variable] int N,M,K,i,j,z,t,nr1,nr2,it,x,y,c; ^ user.cpp:14:21: warning: unused variable ‘t’ [-Wunused-variable] int N,M,K,i,j,z,t,nr1,nr2,it,x,y,c; ^ user.cpp:14:23: warning: unused variable ‘nr1’ [-Wunused-variable] int N,M,K,i,j,z,t,nr1,nr2,it,x,y,c; ^ user.cpp:14:27: warning: unused variable ‘nr2’ [-Wunused-variable] int N,M,K,i,j,z,t,nr1,nr2,it,x,y,c; ^ user.cpp:14:31: warning: unused variable ‘it’ [-Wunused-variable] int N,M,K,i,j,z,t,nr1,nr2,it,x,y,c; ^