Compilare: user.cpp: In function ‘int main()’: user.cpp:60:29: warning: unused variable ‘x’ [-Wunused-variable] int n,m,i,j,x1,j1,x2,j2,x; ^ user.cpp:94:16: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] r[x1][j1]=1; ^ user.cpp:94:16: warning: ‘j1’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:97:17: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] ju[x2][j2]=1; ^ user.cpp:97:17: warning: ‘j2’ may be used uninitialized in this function [-Wmaybe-uninitialized]