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1、代码一: #include int main()int n,j,k,t,a,c;printf(“你需要多大的圣诞树!n“); scanf(“%d“, printf(“n“);for(j=1;jint main() int i,j,k,n,m,b;printf(“请输入您需要的圣诞树的大小n“); scanf(“%d“, for(i=1;i“);Scanner input = new Scanner(System.in);int a = input.nextInt();temp.ChristmasTree(2*a);void ChristmasTree(int n) int i, j, k, m
2、;for (i = 1; i = n / 2;i+) for (j = 1; j n /2 + i; j+) if (j = n / 2- i)System.out.print(“ “);else if (j % 2 =0)System.out.print(“$“);elseSystem.out.print(“*“);System.out.print(“n“);for (k = n / 2 + 1; k= n - n / 4; k+) for (m = 1; m = n+ 1; m+) if (m != n / 2)System.out.print(“ “);elseSystem.out.print(“|“);System.out.print(“n“);