C++: Bảng 12 chương

Code:

#include <iostream>
#include <iomanip>

using namespace std;

int main(){
    const int size{12};
    int i{},j{};
    cout<<endl
        <<size <<" by "<< size <<" Multiplacation Table"<<endl<<endl;
    cout<<endl<<"    |";
    for(i=1;i<=size;i++)
        cout<<setw(3)<<i<<" ";
    cout<<endl;
    for(i=0;i<=size;i++)
        cout<<"____";
    for(i=1;i<=size;i++)
    {
        cout<<endl
            <<setw(3)<<i<<" |";
        for(j=1;j<=size;j++)
            cout<<setw(3)<<i*j<<" ";
    }
    cout<<endl;
    return 0;
}