问删除从线程原因返回的指针；分段错误: 11

EN

#include<stdio.h>
#include<pthread.h>
#include<iostream>

using namespace std;

void* calculator(void* _n) {
    int* n = (int*) _n;
    int* i;
    int result = *n + 1;
    i = &result;

    return i;
}

int main(){
    int input;
    pthread_t calcThread;
    void* exitStatus;
    int* threadResult;

    cout << "Input integer: " << endl;
    cin >> input;
    cout << "Init thread..." << endl;

    pthread_create(&calcThread, NULL, calculator, &input);
    pthread_join(calcThread, &exitStatus);

    // Error around here? 
    threadResult = (int*) exitStatus;
    cout << "Returned: " << *threadResult << endl;
}