112 
 113     }
 114 
 115    /**
 116      * Signed subtraction built upon unsigned add and subtract.
 117      */
 118     void signedSubtract(MutableBigInteger addend) {
 119         if (sign == 1)
 120             sign = sign * subtract(addend);
 121         else
 122             add(addend);
 123         if (intLen == 0)
 124              sign = 1;
 125     }
 126 
 127     /**
 128      * Print out the first intLen ints of this MutableBigInteger's value
 129      * array starting at offset.
 130      */
 131     public String toString() {
 132         BigInteger b = new BigInteger(this, sign);
 133         return
 134             b.toString();
 135     }
 136 
 137 }

 112 
 113     }
 114 
 115    /**
 116      * Signed subtraction built upon unsigned add and subtract.
 117      */
 118     void signedSubtract(MutableBigInteger addend) {
 119         if (sign == 1)
 120             sign = sign * subtract(addend);
 121         else
 122             add(addend);
 123         if (intLen == 0)
 124              sign = 1;
 125     }
 126 
 127     /**
 128      * Print out the first intLen ints of this MutableBigInteger's value
 129      * array starting at offset.
 130      */
 131     public String toString() {
 132         return this.toBigInteger(sign).toString();


 133     }
 134 
 135 }