Compilare: user.cpp: In function ‘int main(int, const char**)’: 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:139:37: warning: ‘t’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (a[i][j]<a[z][t]) max=a[t][z]; ^ user.cpp:139:37: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:146:14: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] w.d=j; ^ user.cpp:145:14: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] w.c=i; ^