c++自学笔记2

时间：2015-01-21 09:00:43 阅读：143 评论：0 收藏：0 [点我收藏+]

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#include <iostream>

using namespace std;
class Complex{
private:
int rear;
int imag;

public:
Complex(){
rear=0;
imag=0;
}
Complex(int r ,int i){
rear=r;
imag=i;
}
Complex complex_add(Complex &d){

Complex c;

c.rear=rear+d.rear;
c.imag=imag+d.imag;

return c;
}
void print(); //输出函数

};

void Complex::print(){

cout<<"("<<rear<<","<<imag<<")"<<endl;

}

int main(int argc, char** argv) {

Complex c1(3,4),c2(5,-10),c3;
c3=c1.complex_add(c2);
cout<<"输出c3: ";
c3.print();

return 0;
}
这个是通过运算符重载实现的，第一个是通过函数实现的，明显比较麻烦
#include <iostream>

using namespace std;
class Complex{
private:
int rear;
int imag;

public:
Complex(){
rear=0;
imag=0;
}
Complex(int r ,int i){
rear=r;
imag=i;
}
Complex operator+(Complex &d){

Complex c;

c.rear=rear+d.rear;
c.imag=imag+d.imag;

return c;
}
void print(); //输出函数

};

void Complex::print(){

cout<<"("<<rear<<","<<imag<<")"<<endl;

}

int main(int argc, char** argv) {

Complex c1(3,4),c2(5,-10),c3;
c3=c1+c2;
cout<<"c1=";
c1.print();
cout<<"c2=";
c2.print();
cout<<"c1+c2=";
c3.print();

return 0;
}

重载运算的符进行分数的运算

#include <iostream>
#include<math.h>
using namespace std;

class Rational{
private:
void normalize(); //负责对分数的简化处理

int numerator; //分子
int denominator; //分母

public:
Rational(int num,int denom){

numerator=num;
denominator=denom;

normalize(); // 化简
}
Rational operator+(Rational rhs);
Rational operator-(Rational rhs);
Rational operator*(Rational rhs);
Rational operator/(Rational rhs);

void print();
};

void Rational::normalize() // 分子分母进行化简
{
int t;
if(denominator<0) // 分子小于0要处理
{
numerator=-numerator;
denominator=-denominator;
}
int a=abs(numerator);
int b=abs(denominator);

while(b>0) //欧几里得（辗转求余法）
{
int t=a%b;
a=b;
b=t;
}

numerator /=a;
denominator /=a;
}

Rational Rational::operator+(Rational rhs){

int a=numerator;
int b=denominator;
int c=rhs.numerator;
int d=rhs.denominator;

int e=a*b+c*d;
int f=b*d;

return Rational(e,f);

}
Rational Rational::operator-(Rational rhs){

rhs.numerator=-rhs.numerator;

return operator+(rhs);

}
Rational Rational::operator*(Rational rhs){

int a=numerator;
int b=denominator;
int c=rhs.numerator;
int d=rhs.denominator;

return Rational(a*c,b*d);
}
Rational Rational::operator/(Rational rhs){

int a=numerator;
int b=denominator;
int c=rhs.numerator;
int d=rhs.denominator;

return Rational(a*d,b*c);

}

void Rational::print(){

if(numerator%denominator==0) //如果可以变成整数
cout<<denominator/numerator;
else
cout<<numerator<<"/"<<denominator;

}

int main(int argc, char** argv) {

Rational f1(2,16);
Rational f2(7,8);

Rational res1=f1+f2; //加法重载
f1.print();
cout<<" + ";
f2.print();
cout<<" = ";
res1.print();
cout<<endl;

Rational res2=f1-f2; //减法重载
f1.print();
cout<<" - ";
f2.print();
cout<<" = ";
res2.print();
cout<<endl;

Rational res3=f1*f2; //乘法重载
f1.print();
cout<<" * ";
f2.print();
cout<<" = ";
res3.print();
cout<<endl;

Rational res4=f1/f2; //除法重载
f1.print();
cout<<" / ";
f2.print();
cout<<" = ";
res4.print();
cout<<endl;




return 0;
}

c++自学笔记2

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原文地址：http://blog.csdn.net/lotluck/article/details/42948685

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