如何在C中的结构指针处为数组中的元素分配值

Question

I have struct like this:

struct temper_t {
   unsigned char rom[8];
   struct temper_t *next;
};

In this main code, I want assign value for rom[8], how do i can do that:

                new_node = (struct temper_t *) malloc(
                        sizeof(struct temper_t));
                new_node->next = NULL;

                int m;
                unsigned char rom_value[8];

                //Luu thong tin vao node moi
                for (m = 0; m < 8; m++) {
                    new_node->rom = rom_value[m]; // not working
                }

Thank you for reading my question.

Update

I create a MCVE for easy understanding: /* * test.c * * Created on: Sep 29, 2015 * Author: phuongh1 */

    #include <stdio.h>
    #include <stdlib.h>
    #include <stdint.h>
    #include <stdbool.h>

    struct temper_t {
        int rom[8];
        struct temper_t *next;
    };

    int main(void) {

        struct temper_t *new_node;
        new_node = NULL;

        int m;
        int rom_value[8];
        rom_value[0] = 10;
        rom_value[1] = 13;
        rom_value[2] = 15;
        rom_value[3] = 16;
        rom_value[4] = 18;
        rom_value[5] = 21;
        rom_value[6] = 25;
        rom_value[7] = 27;

        new_node = (struct temper_t *) malloc(sizeof(struct temper_t));
        new_node->next = NULL;

        //Luu thong tin vao node moi
        for (m = 0; m < 8; m++) {
            new_node->rom[m] = rom_value[m]; // not working
        }

    }

Update: Solved

I found a reason. Because my IDE for firmware coding and it is optimize when compling, the info in debug window shows value of new_node->rom and rom_value not matching. => because firmware code, so I cannot printf value. After I run code with Visual Studio, they were match.

Answer 1

You forgot to specify the index of rom in the assignment loop:

 //Luu thong tin vao node moi
 for (m = 0; m < 8; m++) {
      new_node->rom[m] = rom_value[m]; // not working
 }

Note : currently you are assigning to new_node->rom[m] unknown values since rom_value is not initialized.