头文件

#ifndef  VECTOR_CONTAINER_H_
#define  VECTOR_CONTAINER_H_struct Vector {float v[4];Vector() {for (int i = 0; i < 4 ;++i) {v[i] = 0;}}Vector(float ve[]) {for (int i = 0; i < 4; ++i) {v[i] = ve[i];}}void output() ;};class VectorContainer {public:VectorContainer();// Copy Constructor, need deep copy.VectorContainer(const VectorContainer& other);VectorContainer(Vector *vectors, int size);~VectorContainer();Vector& operator[](int index);Vector* operator->();void operator()();Vector& operator()(int i);float operator()(int i, int j);private:// This is a pointer point to a array of Vector.Vector* vectors_;// The size of the array of Vector.int size_;
};#endif  /*VECTOR_CONTAINER_H*/

.cpp

#include <iomanip>
#include "vector_container.h"
#include <iostream>
using namespace std;void Vector::output()
{int i;float sum=0.0;for(i=0; i<4; i++){sum=sum+v[i];cout<<v[i]<<endl;}cout<<"Sum is "<<sum<<endl;
}VectorContainer::VectorContainer(const VectorContainer& other){int i;size_=other.size_;vectors_=new Vector[size_+1];for(i=0;i<size_;i++){vectors_[i]=other.vectors_[i];}}VectorContainer::VectorContainer(Vector *vectors, int size){int i;size_=size;vectors_=new Vector[size_+1];if(vectors_!=NULL){for(i=0;i<size_;i++)vectors_[i]=vectors[i];}
}VectorContainer:: ~VectorContainer()
{delete []vectors_;vectors_=NULL;cout<<"Destructor is called"<<endl;
}Vector&  VectorContainer::operator[](int index){int i;if(index>=0&&index<=size_-1){for(i=0;i<4;i++){cout<<fixed<<showpoint;cout<<setprecision(2)<<vectors_[index].v[i]<<endl;}}return vectors_[index];}Vector* VectorContainer::operator->(){int i,j,flag;float sum=0.0,temp;for(i=0;i<size_;i++){temp=0.0;for(j=0;j<4;j++){temp=temp+vectors_[i].v[j];}if(temp>sum){sum=temp;flag=i;}}return &vectors_[flag];}void VectorContainer::operator()(){int i,j,k;float temp,sum;float s[1000];for(i=0;i<size_;i++){sum=0.0;for(j=0;j<4;j++){sum=sum+vectors_[i].v[j];}s[i]=sum;}for(j=0;j<size_-1;j++){for(i=0;i<size_-1-j;i++){if(s[i]>s[i+1]){temp=s[i];s[i]=s[i+1];s[i+1]=temp;for(k=0;k<4;k++){temp=vectors_[i].v[k];vectors_[i].v[k]=vectors_[i+1].v[k];vectors_[i+1].v[k]=temp;}}}}for(i=0;i<size_;i++){  cout<<"Case "<<i<<":"<<endl;vectors_[i].output();cout<<endl;}}Vector& VectorContainer::operator()(int i){int m,j,k;float temp,sum;float s[1000];for(m=0;m<size_;m++){sum=0.0;for(j=0;j<4;j++){sum=sum+vectors_[m].v[j];}s[m]=sum;}for(j=0;j<size_-1;j++){for(m=0;m<size_-1-j;m++){if(s[m]>s[m+1]){temp=s[m];s[m]=s[m+1];s[m+1]=temp;for(k=0;k<4;k++){temp=vectors_[m].v[k];vectors_[m].v[k]=vectors_[m+1].v[k];vectors_[m+1].v[k]=temp;}}}}cout<<"Case "<<i<<":"<<endl;vectors_[i].output();    // output the ith //return vectors_[i];}float VectorContainer::operator()(int i, int j){cout<<fixed<<showpoint;cout<<setprecision(2)<<vectors_[i].v[j]<<endl;return vectors_[i].v[j];}

测试源文件

#include "vector_container.h"
#include<iostream>
using namespace std;
int main()
{
float test1[4]={9.2,8.3,7.4,10.7};
float test2[4]={1.0,3.0,2.0,4.0};
float test3[4]={77.0,18.0,27.0,10.0};
Vector v[3];
v[0]=test1;
v[1]=test2;
v[2]=test3;
Vector *ptr=v;
VectorContainer mytest(ptr,3);
mytest();
return 0;
}