答案来啦

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n==0)cout << "Error";
    for(int i = 1; i <= n; i++ ){
        for(int j = 1; j <= n; j++ ){
        	printf ("%dx%d=%2d ", i, j, i * j);
        }
        cout << endl;
    }
	return 0;
}