Question

我在结构，动态内存和文件I / O上练习，但我无法理解这段代码有什么问题。我怀疑错误是realloc函数。当我在文件打开后运行程序时，程序崩溃。我检查了很多次，我想这不是一个与语法相关的问题（特别是对于realloc）。

结构声明：

#define MAXLENPATH 250
#define MAXSTRING 25

typedef struct
{
    int ID;
    char Name[MAXSTRING];
    char Surname[MAXSTRING];
    char code[MAXSTRING];
    int age;
}person;

获取记录信息的功能：

#include <stdio.h>
#include <stdlib.h>
#include "Data.h"
#include "DataBase.h"

void initRecord(person *Person)
{
    printf("Insert ID:\n");
    scanf("%d", &Person->ID);

    printf("Insert Name:\n");
    scanf("%s", Person->Name);

    printf("Insert Surname:\n");
    scanf("%s", Person->Surname);

    printf("Insert Age:\n");
    scanf("%d", &Person->age);

    printf("Insert code:\n");
    scanf("%s", Person->code);

}

主要功能：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "Data.h"
#include "DataBase.h"

int main(void) {

    FILE *ts;
    char *fpath=NULL;
    int pCount=1; //variable to hold database records count
    int i=0;
    int toAdd=0;
    person *personDB=NULL;

    fpath="C:\\Users\\Pio\\Desktop\\FILEOP\\MYTXT.txt";

    personDB = malloc(pCount*sizeof(person));

    //fill the database(in memory)
    i=0;
    while( i < pCount)
    {
        printf("Record %d\n",i+1);
        initRecord(&personDB[i]); //fill i-th database record
        printf("Record %d ID:%d Name:%s Surname:%s Age:%d Code:%s \n", i+1, personDB[i].ID, personDB[i].Name, personDB[i].Surname, personDB[i].age, personDB[i].code );
        i++;


        if(i == pCount) // check if all records are filled, then ask to user how many records wants and realloc new memory
        {
            printf("Insert element to add to database records:");
            scanf("%d", &toAdd);
            personDB=realloc(personDB, toAdd*(sizeof(person)) );
            pCount += toAdd;
        }

    }

    //Print structure on file
    if ((ts=fopen(fpath, "w")) != NULL)
    {
        puts("FILE OPENED");
        fprintf(ts,"************INFO****************\n");
        i=0;
        while (i < pCount)
        {

            fprintf(ts, "Record %d ID:%d Name:%s Surname:%s Age:%d Code:%s \n", i+1, personDB[i].ID, personDB[i].Name, personDB[i].Surname, personDB[i].age, personDB[i].code );

            i++;

        }
        fclose(ts);
    }
    else
        perror("ERROR:");

    system("pause");
    return EXIT_SUCCESS;
}

用realloc重新分配结构数组？

0 个答案: