输入1得九九乘法表,输入2得水仙花数,输入3得斐波拉契数列,输入4得奇阶幻方，的c＋＋代码编程

以下是根据您的需求编写的C++代码示例：

1. 输入1得九九乘法表：

#include <iostream>
using namespace std;

int main() {
    for (int i = 1; i <= 9; i++) {
        for (int j = 1; j <= i; j++) {
            cout << j << " * " << i << " = " << i * j << "\t";
        }
        cout << endl;
    }
    return 0;
}

2. 输入2得水仙花数：

#include <iostream>
using namespace std;

int main() {
    for (int i = 100; i <= 999; i++) {
        int j = i;
        int sum = 0;
        while (j) {
            int k = j % 10;
            sum += k * k * k;
            j /= 10;
        }
        if (sum == i) {
            cout << i << " ";
        }
    }
    return 0;
}

3. 输入3得斐波那契数列：

#include <iostream>
using namespace std;

int main() {
    int n;
    cout << "请输入斐波那契数列的长度：";
    cin >> n;

    int first = 0, second = 1;
    cout << "斐波那契数列前 " << n << " 项为：";
    for (int i = 0; i < n; i++) {
        cout << first << " ";
        int temp = first;
        first = second;
        second = temp + second;
    }
    return 0;
}

4. 输入4得奇阶幻方：

#include <iostream>
using namespace std;

int main() {
    int n;
    cout << "请输入奇数阶幻方的阶数：";
    cin >> n;

    if (n % 2 == 0) {
        cout << "输入错误，阶数必须为奇数！";
        return 0;
    }

    int magicSquare[n][n];
    memset(magicSquare, 0, sizeof(magicSquare));

    int row = 0;
    int col = n / 2;
    for (int num = 1; num <= n * n; num++) {
        magicSquare[row][col] = num;
        row--;
        col++;
        if (row < 0) {
            row = n - 1;
        }
        if (col == n) {
            col = 0;
        }
        if (magicSquare[row][col] != 0) {
            row++;
            col--;
            if (row == n) {
                row = 0;
            }
            if (col < 0) {
                col = n - 1;
            }
            row++;
        }
    }

    cout << "奇阶幻方为：" << endl;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cout << magicSquare[i][j] << "\t";
        }
        cout << endl;
    }
    return 0;
}