左边是我的输出，右边是标准答案，请问如何才能做到像右边这样呢？

Question

#include
using namespace std;
int main()
{

cout << "  " << "|" << "  ";
for(int b = 1;b <= 9;b++)
{
    cout << b << "  ";  
}
cout << endl; 
for(int a = 1;a <=30;a++)
{
    cout << "-";
}
cout << endl;
//输出方形乘法口诀表主要部分
for(int i = 1; i <= 9;i++)
{
    cout << i << " " << "|"<<"  ";//输出行的序号
    for(int j = 1;j <= 9;j++)
    {
        cout << i * j << "  ";
    }
    cout << endl;
}

}

Answer 1

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
    cout << "  " << "|" ;
    for (int b = 1; b <= 9; b++)
    {
        cout << setw(3) << b;
    }
    cout << endl;
    for (int a = 1; a <= 30; a++)
    {
        cout << "-";
    }
    cout << endl;
    //输出方形乘法口诀表主要部分
    for (int i = 1; i <= 9; i++)
    {
        cout << i << " " << "|";//输出行的序号
        for (int j = 1; j <= 9; j++)
        {
            cout << setw(3) << i * j;
        }
        cout << endl;
    }
}