C语言 我想叫它3d数组

Question

如何实现此功能这是一个3D数组我想从用户扫描行，列，单元格的数量，然后发送3D数组

#include <stdio.h>
void School (int(*ptr)[int col][int cell] );//this is a user function 
void main (void){
int row ;//number of row 
int col ;//number of colum
int cell ;//number of cell

printf("Enter Number OF School Layers n");
scanf("%d",&row);
printf("Enter Number OF Classes in each Layer n");
scanf("%d",&col);
printf("Enter Number OF Students in each Class n");
scanf("%d",&cell);


int arr [row][col][cell];


School(arr,row,col,cell);//calling of function 
}
void School (int(*ptr)[int col][int cell] ){//i want what write here

}

在这个代码中，我有问题

Answer 1

首先，您需要更新函数原型以接受数组参数之前的维度(实际上是指向数组的指针)。

void School (int rows, int cols, int cells, int arr[rows][cols][cells]);

然后调用它:

School(row, col, cell, arr); 

实际的扫描码应该是:

void School (int rows, int cols, int cells, int arr[rows][cols][cells]) {
for (int row = 0; row < rows; ++row)
for (int col = 0; col < cols; ++col)
for (int cell = 0; cell < cells; ++cell)
scanf("%d", &arr[row][col][cell]);
}

GCC的扩展允许在传递参数之前声明参数。

void School (int rows, cols, cells; int arr[rows][cols][cells], int rows, int cols, int cells);

你可以这样调用函数:

School(arr, row, col, cell);

Answer 2

void School (size_t layers, size_t col, size_t cell, int (*ptr)[col][cell])
{

}