Question

用C++语言定义一个类，实现加减乘除运算

Answer 1

#include <iostream.h>
class CMy_Math
{
public:
CMy_Math();
~CMy_Math();

public:
double add(double a,double b); //加法
double div(double a,double b);//除法
double subtract(double a,double b);//减法
double mult(double a,double b); //乘法
};

CMy_Math::CMy_Math()
{

}
CMy_Math::~CMy_Math()
{

}
double CMy_Math::add(double a,double b)
{

return a+b;
}
double CMy_Math::subtract(double a,double b)
{
return a-b;
}
double CMy_Math::mult(double a,double b)
{
return a*b;
}
double CMy_Math::div(double a,double b)
{
if ( 0.0 != b)
//b不能为0.0
return a/b;

}
int main(double argc, char* argv[])
{

CMy_Math my;
double sum=0;
sum= my.add(10,5);
cout<<"10+5 = "<<sum<<endl;

sum= my.subtract(10,5);
cout<<"10-5 = "<<sum<<endl;

sum= my.subtract(10,5);
cout<<"10*5 = "<<sum<<endl;

sum= my.div(10,5);
cout<<"10/5 = "<<sum<<endl;

return 0;

}

Answer 2

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