The whole number of points of the offer-value of the sword

Title Description

The integer exponent of the floating-point base and int type given a double type. The exponent of the base of the second party.

/*** Consider the situation: The index may be positive, negative, 0. * Base is 0, exponent is 0 or negative, throw exception handling *@paramBase Radix *@paramExponent Index *@return     */     Public Static DoublePowerDoubleBaseintexponent) {        //The index and the base cannot be 0 at the same time, mathematically meaningless .        if(Equal (base, 0.0) && exponent <= 0)            Throw NewRuntimeException ("Invalid iuput. Base and exponent both is zero "); //index is 0, return 1        if(Exponent = = 0)            return1.0; intExp =exponent; if(Exponent < 0) Exp= -exp; //seeking power to the square        Doubleresult =powerwithunsignedexponent (base, exp); //The exponent is negative and the countdown is        if(Exponent < 0) {result= 1.0/result; }                returnresult; }    Private Static DoublePowerwithunsignedexponent (DoubleBaseintexp) {        Doubleresult = 1.0;  for(intI=1; i<=exp; i++) {result*=Base; }        returnresult; }        //Comparison of two double type data    Private Static BooleanEqualDoubleNUM1,Doublenum2) {        if((Num1-num2 > -0.0000001) && (Num1-num2 < 0.0000001))             return true; return false; }

Optimization method:

Private Static DoublePowerWithUnsignedExponent1 (DoubleBaseintexp) {        if(exp = = 0)            return1.0; if(exp = = 1)            returnBase; Doubleresult = Powerwithunsignedexponent (base, exp >> 1);//shift right instead of dividing by 2Result *=result; if(exp & 1) = = 1) {//determining the power of odd and even times, which is substituted for the remainder operationResult *=Base; }        returnresult; }

The whole number of points of the offer-value of the sword