scale=2

print "\nCheck book program!\n"

print "  Remember, deposits are negative transactions.\n"

print "  Exit by a 0 transaction.\n\n"

print "Initial balance? "; bal = read()

bal /= 1

print "\n"

while (1) {

  "current balance = "; bal

  "transaction? "; trans = read()

  if (trans == 0) break;

  bal -= trans

  bal /= 1

}

quit