C语言读取TXT将数据放到堆区中

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>


int getFilelen(FILE * file)
{
    int len = 0;
    if (file == NULL)
    {
        return -1;
    }
    char buf[1024];
    //读取每一行
    while (fgets(buf, 1024, file) != NULL)
    {
        len++;

    }
    //设置光标
    fseek(file, 0, SEEK_SET);
    return len;

}
                //文件指针     长度      堆区数组
void readFileData(FILE * file, int len, char ** pArray)
{
    if (file == NULL || len <= 0 || pArray == NULL)
    {
        return;
    }
    char buf[1024];
    //读取每一行
    int index = 0;
    while (fgets(buf, 1024, file) != NULL)
    {
        int currentlen = strlen(buf) + 1;
        char * currenP = (char *)malloc(sizeof(char) * currentlen);
        strcpy(currenP, buf);
        pArray[index++] = currenP;
        memset(buf, 0, 1024);
    }
}
void showFileData(char ** pArray, int len)
{
    for (int i = 0; i < len; i++)
    {
        printf("第%d行内容:%s", i+1, pArray[i]);
    }
}
void freeSpace(char ** pArray, int len)
{
    if (pArray == NULL || len == NULL)
    {
        return;
    }
    for (int i = 0; i < len; i++)
    {
        if (pArray[i] != NULL)
        {
            free(pArray[i]);
            pArray[i] = NULL;
        }
    }
}
void test01()
{
    FILE * file = fopen("./test.txt", "r");
    if (file == NULL)
    {
        printf("打开文件失败！\n");
        return;
    }
    int len = getFilelen(file);

    char ** pArray = (char **)malloc(sizeof(char *) * len);
    readFileData(file, len, pArray);
    showFileData(pArray, len);
    freeSpace(pArray, len);
    pArray = NULL;
}

void main()
{
    test01();
    putchar('\n');
    system("pause");
}