to refactor for refactor

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v1.1 if all algorithm are in one function, it will expand. so each operate type should be separated.

question: if add scientific 

operation.cpp:

#include "operation.h"

int OperationAdd(string number1, string number2){

    int result= atoi(number1.c_str())+atoi(number2.c_str());

    return result;

}

int OperationMinus(string number1, string number2){

    int result= atoi(number1.c_str())-atoi(number2.c_str());

    return result;

}

int OperationBy(string number1, string number2){

    int result= atoi(number1.c_str())*atoi(number2.c_str());

    return result;

}

int OperationDivide(string number1, string number2){

    int result= atoi(number1.c_str())/atoi(number2.c_str());

    return result;

}

int Operation(string number1, string number2, string operateType){

    int result=0;

    if(operateType=="+"){

        result = OperationAdd(number1, number2);

    }

    else if(operateType=="-"){

        result = OperationMinus(number1, number2);

    }

    else if(operateType=="*"){

        result = OperationBy(number1, number2);

    }

    else if(operateType=="/"){

        result = OperationDivide(number1, number2);

    }

    else{

        result =0;

    }

    return result;

}

to refactor for refactor

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原文地址：http://www.cnblogs.com/dannykong/p/4293426.html