#include<iostream.h>
void print(int w){
for(int i=1;i<=w;i++)
{for(int j=1;j<=i;j++)
cout<<i<<" ";
cout<<endl;
}}

void main(){
print(5);}

运行结果是
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5