这个代码出了什么问题运行不出来

Question

#include <iostream>

using namespace std;

int main()
{
        cout<<"nums = [";
        int aa[9999999];
        int k,target,n=0,p;
        char a;
        for(int i=0;;i++){
                cin>>aa[i];
                n++;
                cin>>a;
                if(a==']'){
                    break;
                }
        }
        cout<<", target = ";
        cin>>target;
        cout<<endl;
        cout<<"[";
        for(int i=0;i<n;i++){
            p=0;
            k=target-aa[i];
            for(int j=0;j<n;j++){
                while(aa[i]==k){
                     p++;
                }
                if(p!=0){
                    cout<<i<<","<<j<<"]";
                }
            }
            if(p!=0){
                    break;
                }

        }
    return 0;
}

Answer 1

#include <iostream>
#include <vector>
#include <unordered_map>

using namespace std;

int main()
{
    cout << "nums = [";
    vector<int> nums;
    int num;
    char a;

    while (true) {
        cin >> num;
        nums.push_back(num);
        cin >> a;
        if (a == ']') {
            break;
        }
    }

    cout << "], target = ";
    int target;
    cin >> target;
    cout << endl;

    unordered_map<int, int> num_map;
    for (int i = 0; i < nums.size(); ++i) {
        int complement = target - nums[i];
        if (num_map.find(complement) != num_map.end()) {
            cout << "[" << num_map[complement] << "," << i << "]" << endl;
            return 0;
        }
        num_map[nums[i]] = i;
    }

    cout << "No two sum solution found." << endl;
    return 0;
}