Compilare: user.cpp: In function ‘int main(int, const char**)’: user.cpp:74:18: warning: unused variable ‘k’ [-Wunused-variable] {int i,j,x,y,z,t,k,l; ^ user.cpp:74:20: warning: unused variable ‘l’ [-Wunused-variable] {int i,j,x,y,z,t,k,l; ^ user.cpp:145:38: warning: unused variable ‘ok2’ [-Wunused-variable] int min=-1,max=a[x][y],mij; bool ok2=false, ok=false; ^ user.cpp:166:21: warning: ‘t’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (viz[z][t]) min=mij; ^ user.cpp:166:21: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:153:14: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] w.d=y; ^ user.cpp:152:14: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] w.c=x; ^