public class study{
public static void main(String args[]){
int i,j,level=7;
int Yang[][] = new int[level][];
System.out.println("杨辉三角");
for(i = 0;i<Yang.length;i++){
Yang[i] = new int[i+1];
}
Yang[0][0] = 1;
//第一个元素为1
}
for(i = 1;i<Yang.length;i++){
//左边为1
Yang[i][0] = 1;
Yang[i][Yang[i].length-1]=1;
//右边为1
for(j=1;j<Yang[i].length-1;j++){
Yang[i][j] = Yang[i-1][j-1]+Yang[i-1][j];
}
}
//输出杨辉三角形
for(i=0;i<Yang.length;i++){
for(j=0;j<Yang[i].length;j++){
System.out.print(Yang[i][j]+" ");
}
System.out.println();
//换行
}
}