malloc 16mb时出现分段错误

Question

当使用malloc分配16777216（16mb）并尝试迭代该数组n次时，我遇到了分段错误。我似乎无法找到为什么会出现分段错误..

register *a;
a = malloc(16777216);
int times, i, dummy, timeTaken;
for (times = 0; times < 10000; times++) {
    for (i = 0; i < 16777216; i += 1) {
        dummy = a[i];
    }
}

Answer 1

应该是：

 register int *a;
 a = malloc(16777216*sizeof(int));