tugas

#include<iostream>

using namespace std;

int main()
{
    int n,j,i,angka;
    n=10;
    j=1;
    i=1;
    char huruf;

    for (j<=n;j++;)
    {angka=1;
    huruf='a';
    for(i<=j;i++;)
    {
        if(i%2 !=0)
        {
            cout<<angka;
            angka++;
        }
        else
        {
            cout<<huruf;
            huruf++;
        }
    }
    }