代码：

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

using namespace std;

typedef struct
{
    double dvalue;
    double* dpointer;
    double dArray[20];
    int nmax;
}test_t;

int initTest(test_t* test)
{
    memset(test, 0, sizeof(test_t));
    test->nmax = 20;
    test->dpointer = (double*)malloc(sizeof(double) * test->nmax);
    return 1;
}
int main()
{
    test_t test1 = { 0 };
    test_t test2 = { 0 };

    initTest(&test1);
    initTest(&test2);
    test1.dpointer[1] = 10.0;
    test1.dArray[1] = 10.0;

    printf("test1 dpointer addr:%p,test2 daary addr:%p\n", test1.dpointer, test2.dpointer);
    printf("test1 dArray addr:%p,test2 dArray addr:%p\n", test1.dArray, test2.dArray);
    cout << "*****after test2=test1*****" << endl;
    test2 = test1;
    test2.dpointer[1] = 20.0;
    test2.dArray[1] = 20.0;
    cout << "test1 dpointer value:" << test1.dpointer[1] << ",test2 dpointer value:" << test2.dpointer[1] << endl;
    cout << "test1 dArray value:" << test1.dArray[1] << ",test2 dArray value:" << test2.dArray[1] << endl;
    printf("test1 dpointer addr:%p,test2 daary addr:%p\n", test1.dpointer, test2.dpointer);
    printf("test1 dArray addr:%p,test2 dArray addr:%p\n", test1.dArray, test2.dArray);
    getchar();
}

输出：