nIf an
identifier has not been initialized before it is used, the
compiler may notice the error and notify the programmer, or it may ignore the fact and
use the garbage that appears in the memory space assigned to
the identifier.
nGarbage in,
Garbage out
nint m=7,n=m, q;
ncout << "m = "
<< m << endl; //
m = 7
ncout << "n = " << n << endl; // n = 7
nq = q + n;
// q doesn’t have any value
ncout << "q = " << q << endl; // q = -858993453
