C++中 使用动态内存总是说我未初始化

Question

请各位看看,动态内存,数组,初始化到底要怎么做?

#include <iostream>
using namespace std;

int main() {
    int n =3;
    int m =3;
    int* pp ;
    pp = new int[m];
    int* point;

    int* px;
    px = new int[m];
    int temp = 0;

    cout << "你有多少数组需要相加";
    cin >> n;
    for (int i = 0; i < n ; i++) {
        cout << "请输入第" << i +1<< "列数组的数量:";
        cin >> m;    
        pp[i] = m;
        int ty = 0;
        if (m >= temp)
        {temp = m;}
        else { temp = temp; }
        for (int l=0; l < m ; l++,ty++) {
            cout << "第 " << i +1<< " 列数组,第 " <<l+1<<" 个数字:"<<endl;
            int x = 30;
            cin >> x;
            point = new int[(temp * n)];
            point[ty] = x;
        }
    }

    for (int i, x = 0; pp[x] < temp; x++) {
        for (i = 0; i < pp[x]; i++){
            px[i] = point[i];
        }
        for (int a = 0; pp[x] + a < temp; i++, a++) {
            pp[i] = 0;
        }
    }
    cout << "你一共输入的数组列表如下:"<<endl;
    for (int y= 1; y <=  n; y++) {
        cout << y << "   ";
        for (int i = 0; i < temp * y; i++) {
            cout << pp[i] << "    ";
        }
        cout << endl;
    }  
    
    delete[] pp, px, point;
    return 0;
}

Answer 1

把p=new in[n]
这句代码
放到输入n的值的后面去