#include<bits/stdc++.h>
using namespace std;
signed main(){
	int n,m;
	cin>>n>>m;
	for(int i=1;i<=m;i++){
		cout<<setw(2)<<i<<" ";
		if(i%n==0)cout<<"\n";
	}
}

cout 的时候加个 setw 直接秒杀。

#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
	int c=b%a;
	int ans=1;
	for(int i=1;i<=b/a;i++)
	{
		for(int j=1;j<=a;j++)
		{
			cout<<setw(2)<<ans<<' ';
			ans++;
		}
		cout<<endl;
	}
	for(int i=1;i<=c;i++)
	{
		cout<<setw(2)<<ans<<' ';
		ans++;
	}
	return 0;
}

直接用setw设置域宽即可。

#include<bits/stdc++.h>
#define int long long
#define INF 0x3f3f3f
using namespace std;
int x,y,ans;
signed main(){
	cin>>x>>y;
	for(int i=1;i<=y;i++){
		ans++;
		cout<<setw(2)<<i<<" ";
		if(ans%x==0)cout<<"\n";//记得中间要换行
	}
	return 0;
}

C++ :

#include <bits/stdc++.h>
using namespace std;
int main(){
	//freopen("pfz.in","r",stdin);
	//freopen("pfz.out","w",stdout);
	int m,n;
	cin>>m>>n;
	for(int i=1;i<=n;i++){
		cout.width(2);
		cout<<i<<" "; 
		if(i%m==0){
			cout<<endl; 
		}	
	}
	return 0;
	fclose(stdin);
	fclose(stdout);
}

Python :

# coding=utf-8
x=input().split()
a=int(x[0])
b=int(x[1])
ans=0
for i in range(1,b+1):
    ans=ans+1
    ans=ans%a
    if i<10:
        print(" ",end='')
    print(i,end=' ')
    if ans==0:
        print()