Compilare: user.cpp: In function ‘int main(int, const char**)’: user.cpp:68:10: warning: variable ‘x’ set but not used [-Wunused-but-set-variable] {int i,j,x,y,z,t,k,l; ^ user.cpp:68:18: warning: unused variable ‘k’ [-Wunused-variable] {int i,j,x,y,z,t,k,l; ^ user.cpp:68:20: warning: unused variable ‘l’ [-Wunused-variable] {int i,j,x,y,z,t,k,l; ^ user.cpp:138:27: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int min,max,mij; bool ok=false; ^ user.cpp:139:50: warning: ‘t’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (a[i][j]<a[z][t]) {min=a[i][j];max=a[t][z];} ^ user.cpp:145:14: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] w.c=i; ^ user.cpp:146:14: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] w.d=j; ^