重载板子
ฅ'ω'ฅ♪

存几个自用的重载板子a'w'a

以一个复数类为例

#include <bits/stdc++.h>
#define selcal(a) this->dig_real = this->dig_real a temp.dig_real , this->dig_virt = this->dig_virt a temp.dig_virt ;

using namespace std ;

class Complex
{
    public :
        Complex( const int real=0 , const int virt=0 ){
            dig_real = real , dig_virt = virt ; vis=cont++;
            //printf("%c plural be Maaaaaked~\n",vis);
        }
        ~Complex(){
            //printf("A plural has GUuuuunned~%c\n",vis);
        }
        void show()const{
            printf( dig_virt ? "< %d + %di >\n":"< %d >\n",dig_real , dig_virt );
        }//--------------------------------------------//
        Complex operator+ ( int x ) ;//复数加常数
        Complex operator- ( int x ) ;//
        Complex operator* (  Complex &amp; ) ;//
        Complex operator/ (  Complex &amp; ) ;//
        Complex operator+=( const Complex &amp; ) ;//
        Complex operator-=(  Complex &amp; ) ;//
        Complex&amp; operator*=( const Complex &amp; ) ;//
        Complex&amp; operator/=( const Complex &amp; ) ;//

        Complex operator++();//两种形式 
        Complex operator++( int x );
        Complex&amp; operator -();//前置复数取反
        Complex&amp; operator ~();//前置取共轭

        Complex operator+ (  const Complex &amp; )const ;//
        Complex operator- (  const Complex &amp; )const ;//
        friend Complex operator--( Complex&amp; ) ;
        friend Complex operator--( Complex&amp; , int ) ;
        friend Complex operator+ ( const int , const Complex &amp; ) ;//常数加复数 
        friend Complex operator- ( const int , const Complex &amp; ) ;//

        //friend Complex&amp;   operator/ ( int , const Complex &amp; ) ;
        //--------------------------------------------//
    private :
        int dig_real ;
        int dig_virt ;
        char vis ;
        static int cont ;
        friend istream&amp; operator>> ( istream &amp; ,  Complex &amp; ) ;//
        friend ostream&amp; operator<< ( ostream &amp; , const Complex &amp; ) ; //
};
int Complex::cont = 'a' ;
//---------------------------------------------------------//
Complex Complex:: operator+ ( int x )
{   return Complex((dig_real^x)+((dig_real&amp;x)<<1), dig_virt) ; }

Complex Complex:: operator+ ( const Complex &amp;temp )const
{   return Complex( (dig_real^temp.dig_real)+((dig_real&amp;temp.dig_real)<<1) , (dig_virt^temp.dig_virt)+((dig_virt&amp;temp.dig_virt)<<1)) ; }

Complex operator+ ( const int x  , const Complex &amp;temp )
{   Complex Ccc(temp) ; return Ccc + x; }  

Complex Complex::operator - ( int x )
{   return Complex(this->dig_real-x,this->dig_virt) ; }

Complex Complex:: operator- ( const Complex &amp;temp )const
{   return Complex( dig_real - temp.dig_real, dig_virt - temp.dig_virt); }

Complex operator- ( const int x  , const Complex &amp;temp )
{   Complex Ccc(temp) ; return -Ccc+x; }  

Complex Complex:: operator* ( Complex &amp;temp )
{   return Complex( dig_real*temp.dig_real-(dig_virt*temp.dig_virt) ,dig_virt*temp.dig_real+dig_real*temp.dig_virt); }

Complex Complex:: operator/ ( Complex &amp;temp )
{   return Complex( (dig_real*temp.dig_real + dig_virt*temp.dig_virt) / (temp.dig_real*temp.dig_real + temp.dig_virt*temp.dig_virt) , (dig_virt*temp.dig_real - dig_real*temp.dig_virt) / (temp.dig_real*temp.dig_real + temp.dig_virt*temp.dig_virt) ); }

Complex Complex:: operator+=( const Complex &amp;temp )
{   selcal(+) return *this ; }

Complex Complex:: operator-=( Complex &amp;temp )
{   selcal(-) return *this ; }

Complex&amp; Complex:: operator*=( const Complex &amp;temp )
{
    Complex ccc(*this);
    int medi = dig_real;
    ccc.dig_real = ccc.dig_real*temp.dig_real - ccc.dig_virt*temp.dig_virt ,
    ccc.dig_virt = ccc.dig_virt*temp.dig_real + medi*temp.dig_virt;
    dig_real=ccc.dig_real , dig_virt=ccc.dig_virt;
    return *this;
}

Complex&amp; Complex:: operator/=( const Complex &amp;temp )
{
    Complex ccc(*this);
    ccc.dig_real = ((this->dig_real * temp.dig_real) + (this->dig_virt * temp.dig_virt)) / ((temp.dig_real * temp.dig_real) + (temp.dig_virt * temp.dig_virt));
    ccc.dig_virt = ((this->dig_virt * temp.dig_real) - (this->dig_real * temp.dig_virt)) / ((temp.dig_real * temp.dig_real) + (temp.dig_virt * temp.dig_virt));
    dig_real = ccc.dig_real , dig_virt = ccc.dig_virt ;
    return *this ;
    //return ccc;
}

Complex Complex::  operator++()
{   ++dig_real ; return *this ; }

Complex Complex::  operator++( int x)
{   Complex temp(*this) ; ++dig_real ; return temp ; }

Complex operator--( Complex &amp;temp ) 
{   --temp.dig_real ; return temp; }

Complex operator--( Complex &amp;temp , int x ) 
{   Complex ccc(temp) ; --temp.dig_real ; return ccc ;}

Complex&amp; Complex:: operator -()
{   this->dig_real = 0-this->dig_real , this->dig_virt = 0-dig_virt ; return *this ; }

Complex&amp; Complex:: operator ~()
{   this->dig_virt = 0-dig_virt ; return *this ; }

istream&amp; operator>>(istream &amp;os,  Complex &amp;temp )
{   os >> temp.dig_real >> temp.dig_virt;   return os; }

ostream&amp; operator<<(ostream &amp;os, const Complex &amp;temp)
{   os.unsetf(std::ios::showpos);os << "<" << temp.dig_real ; os.setf(std::ios::showpos); os << temp.dig_virt<< "i>"<<endl; return os; }

int main()
{
    Complex c1( 1 , 2 ) ,c2( 2 , 4 ) , c3( 10 , 11 ),c4( 4 , 8 );
    Complex cc[20] ;
    //printf("::");
    cc[0]=c1+2 ;    printf(" 1+2i + 2 = ") ;        cout<<cc[0] ;
    cc[1]=c1+c2;    printf(" 1+2i + 2+4i = ") ;     cout<<cc[1] ;
    cc[2]=c3-3 ;    printf(" 10+11i - 3 = ") ;      cout<<cc[2] ;
    cc[3]=c3-c2;    printf(" 10+11i - 2+4i = ");    cout<<cc[3] ;
    cc[4]=c3*c2;    printf(" 10+11i * 2+4i = ");    cout<<cc[4] ;
    cc[5]=c4/c2;    printf(" 4+8i / 2+4i = ");      cout<<cc[5] ;
    c1+=c2 ;        printf(" c1+=c2:") ;            cout<<c1 ;
    c1-=c2 ;        printf(" c1-=c2:") ;            cout<<c1 ;
    c1*=c2 ;        printf(" c1*=c2:") ;            cout<<c1 ;
    c1/=c2 ;        printf(" c1/=c2:") ;            cout<<c1;
    cc[6]=3+c2 ;    printf(" 3 + 2+4i = ") ;        cout<<cc[6] ;
    cc[7]=3-c2 ;    printf(" 3 - 2+4i = ") ;        cout<<cc[7] ;
    cc[8]=++c4 ;    printf(" ++c4 = ") ;            cout<<cc[8]   ;
    cc[9]=c4++ ;    printf(" c4++ = ") ;            cout<<cc[9]   ;
    cout<<"Now c4 is"<<c4 ;
    cc[10]=--c4 ;   printf(" --c4 = ") ;            cout<<cc[10] ;
    cc[11]=c4-- ;   printf(" c4-- = ") ;            cout<<cc[11] ;
    cc[19]=-c4;     printf(" -c4= ") ;              cout<<cc[19] ;
    cc[18]=~c4;     printf(" ~-c4= ") ;             cout<<cc[18] ;

    cout<<"CC[17] is"<<cc[17];  
    cin>>cc[17] ;
    cout<<"Now CC[17] is"<<cc[17];  

}
CANCEL

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