Realloc和sscanf成为一个函数

Question

我有一个有num行的文件:每行包含一个数字.我想将每个数字保存到矢量中*vet.为什么这段代码不起作用？

Segmentation fault (core dumped)

我认为错误是sscanf在save_numbers功能,但我不知道为什么.

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

/* This function allocate memory
and save numbers into a vector */
int save_numbers (int **vet, int *num)
{
    FILE *fin;
    int i = 0;
    char buff[10];

    if ( !(fin = fopen("numbers.dat", "r")) )
        return 1;

    while ( fgets(buff, sizeof(buff), fin) )
    {
        *vet = (int *) realloc (*vet, (i+1) * sizeof(int) );
        sscanf (buff, "%d", vet[i]);
        i++;
    }

    *num = i;

    return fclose(fin);
}

int main ()
{
    int i, num, *vet = NULL;    

    if ( save_numbers(&vet, &num) )
    {
        perror("numbers.dat");
        exit(1);
    }

    /* print test */
    for (i=0; i<num; i++)
        printf ("%d ", vet[i]);
    printf("\n");

    free(vet);

    return 0;
}

文件示例:http://pastebin.com/uCa708L0

Answer 1

更改

sscanf (buff, "%d", vet[i]);//vet : int **

至

sscanf (buff, "%d", &(*vet)[i]);