#include<iostream>
using namespace std;
int main()
{
    const int N=4;
    for(int i=1;i<=N;i++)
    {
        for(int j=1;j<=30;j++)
            cout<<' ';
        for(int j=1;j<=8-2*i;j++)
            cout<<' ';
        for(int j=1;j<=2*i-1;j++)
            cout<<'*';
        cout<<endl;
    }
    for(int i=1;i<=N-1;i++)
    {
        for(int j=1;j<=30;j++)
            cout<<' ';
        for(int j=1;j<=7-2*i;j++)
            cout<<'*';
        cout<<endl;
    }
    return 0;
}

目的是输出一个图形
          *
        ***
      *****
    *******
    *****
    ***
    *
我是初学的，这段是书上抄的，抱错如下
--------------------Configuration: fwef - Win32 Debug--------------------
Compiling...
fwef.cpp
E:\VC++\fwef.cpp(10) : error C2374: 'j' : redefinition; multiple initialization
        E:\VC++\fwef.cpp(8) : see declaration of 'j'
E:\VC++\fwef.cpp(12) : error C2374: 'j' : redefinition; multiple initialization
        E:\VC++\fwef.cpp(8) : see declaration of 'j'
E:\VC++\fwef.cpp(16) : error C2374: 'i' : redefinition; multiple initialization
        E:\VC++\fwef.cpp(6) : see declaration of 'i'
E:\VC++\fwef.cpp(20) : error C2374: 'j' : redefinition; multiple initialization
        E:\VC++\fwef.cpp(18) : see declaration of 'j'
执行 cl.exe 时出错.

重载是什么