Question

我为矩阵分配了内存块。比起周期，我记得那些线路上的诗人我得到了未处理的异常：访问冲突写入位置0x00557148 在_tmain循环中。我错了什么？

double **d; 

#define COUNT 10 

int create()
{
    d = (double**) malloc(COUNT * sizeof(double*));
    if (!d)
        return 0; 
    int size = COUNT * sizeof(double); 
    double *_new =  (double*) malloc(COUNT * size);

    if (!_new)
        return 0; 
    for (int i = 0; i < COUNT; i++) {
        d[i] = _new;
        _new += size; 
    }

    return 1; 
}

int _tmain(int argc, _TCHAR* argv[])
{
    double *_d; 
    if (create()) {
        for(int i = 0; i < COUNT; i++) {
            _d = d[i]; 
            for (int j = 0; j < COUNT; j++)
                _d[j] = 5; 
        }
    } else
        return -1;

    return 0;
}

Answer 1

我很确定您需要将_new += size更改为_new += COUNT

用于二维数组的动态malloc

1 个答案: