Compilare: main.cpp: In function 'int main()': main.cpp:11:15: warning: unused variable 'xx' [-Wunused-variable] int n,m,k,xx,yy,x,y,c; ^~ main.cpp:11:18: warning: unused variable 'yy' [-Wunused-variable] int n,m,k,xx,yy,x,y,c; ^~ main.cpp:11:21: warning: unused variable 'x' [-Wunused-variable] int n,m,k,xx,yy,x,y,c; ^ main.cpp:11:23: warning: unused variable 'y' [-Wunused-variable] int n,m,k,xx,yy,x,y,c; ^ main.cpp:11:25: warning: variable 'c' set but not used [-Wunused-but-set-variable] int n,m,k,xx,yy,x,y,c; ^