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下面自定义的vector类的代码有什么问题？

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0 | 2011-5-23 10:34:22 | 显示全部楼层 |阅读模式

#include\"iostream\"
#include\"string\"
usingnamespacestd;

templatetypenameT
classVector
{
public:
T*elements;
intsize;
intcapacity;

Vector()
{
size=0;
capacity=100;
elements=newT[capacity];
}
voidensureCapacity()
{
if(size=capacity)
{
T*old=elements;
capacity=2*size;
elements=newT[size*2];
for(inti=0;isize;i)
elements=old;
}
}
voidpush_back(Telement)
{
ensureCapacity();
elements[size]=element;
size;
}
voidpop_back()
{
size--;
}
intgetSize()
{
returnsize;
}
Tat(intindex)
{
returnelements[index];
}
boolempty()
{
return(size==0);
}
voidclear()
{
size=0;
}

voidswap(Vectorv2)
{
Ttemp[100];
inttempSize=v2.size();
for(inti=0;iv2.size();i)
temp=v2.at(i);

v2.clear();
for(inti=0;isize();i)
v2.push_back(at(i));

clear();
for(inti=0;itempSize;i)
push_back(temp);

}
};

intmain(intargc,char*argv[])
{
Vectorintvector1;
Vectorstringvector2;
Vectorintvector3;
vector1.push_back(5);
vector1.push_back(3);
vector1.push_back(99);
vector2.push_back(\"China\");
vector2.push_back(\"Guangdong\");
vector3.push_back(14);
vector3.push_back(744);

cout\"Theelementsinvector1are:\"vector1.elements[0]\"\"vector1.elements[1]\"\"vector1.elements[2]endl;
cout\"Theelementsinvector2are:\"vector2.elements[0]\"\"vector2.elements[1]endl;

vector1.pop_back();
vector2.pop_back();

cout\"Afterpopingback:\"endl;
cout\"Theelementsinvector1are:\"vector1.elements[0]\"\"vector1.elements[1]endl;
cout\"Theelementsinvector2are:\"vector2.elements[0]endl;

vector2.swap(vector3);
cout\"Theelementsinvector1are:\"vector1.at(0)endl;
cout\"Theelementsinvector2are:\"vector2.at(0)\"\"vector2.at(1)endl;

return0;
}

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