[C++知识库]C++打印杨辉三角形

C++打印杨辉三角形

#include <iostream>
using namespace std;
int *yanghui(int);
void display(int *a,int size);
int main(){

	yanghui(10);
	
} 

int *yanghui(int ceng){
  	if(ceng==1){
  		int arr[1]={1};
  		cout<<1<<endl;
  		return arr;
	  }
	int *arr1=yanghui(ceng-1);
	int *arr2=new int[ceng];
	arr2[0]=1;
	arr2[ceng-1]=1;
	if(ceng>2){
		for(int i=1;i<=ceng-2;i++){
			arr2[i]=arr1[i-1]+arr1[i];
		}
	}
	display(arr2,ceng);
	cout<<endl;
	return arr2;
} 

void display(int *a,int size){	
	for(int i=0;i<size;i++,a++){
		cout<<*a<<'\t';
	}
	delete [] a;
}