C分割故障打印2D数组

Question

当我尝试调用函数createPlayground时，该函数应在Console中打印一个2D数组，我会得到分割故障。我不知道怎么了。

#include<stdio.h>
#include<stdlib.h>
void createPlayground(int, int **);
void printPlayground(int, int **);
int main() {
    int size = 8;
    int **playground;
    createPlayground(size, playground);
    printPlayground(size, playground);
    return 0;
}
void createPlayground(int size, int **array) {
    array = (int **) malloc(size * sizeof(int *));
    for (int i = 0; i < size; ++i) {
    array[i] = (int *) calloc(size, sizeof(int));
    }
}
void printPlayground(int size, int **array) {
    for (int i = 0; i < size; ++i) {
        for (int j = 0; j < size; ++j){
            printf("%d  ", array[i][j]);
        }
        printf("n");
    }
}

Answer 1

您需要将另一个间接级别添加到createPlayground：

void createPlayground(int size, int ***array) {
    *array = (int **)malloc(size * sizeof(int *));
    for (int i = 0; i < size; ++i) {
        (*array)[i] = (int *)calloc(size, sizeof(int));
    }
}

这样称呼：

createPlayground(size, &playground);

请注意，printPlayground的当前签名很好，因为它没有修改指针。