free（）时出错，为何如此？

Question

void Transmatrix(matrix sample)

{
int psample, ptemp, col;
int* cnum, * cpos;
node temp;

temp = (node)calloc(sample->num, sizeof(struct Node));
cnum = (int*)calloc(sample->r + 1, sizeof(int));
cpos = (int*)calloc(sample->r + 1, sizeof(int));

for (psample = 0; psample < sample->num; psample++) {
    cnum[sample->front[psample].r]++;
}

for (col = 1; col <= sample->r; col++) {
    cpos[col] = cpos[col - 1] + cnum[col - 1];
}

for (psample = 0; psample < sample->num; psample++) {
    col = sample->front[psample].r;
    ptemp = cpos[col];

    temp[ptemp].data = sample->front[psample].data;
    temp[ptemp].l = sample->front[psample].r;
    temp[ptemp].r = sample->front[psample].l;

    cpos[ptemp]++;
}

free(sample->front);
sample->front = temp;

free(cpos);    //出错
free(cnum);

}

Answer 1

https://blog.csdn.net/zwhsoul/article/details/80146669