Question

求大神解决下C语言问题

下面这段代码中的这行item=*(maze+(i*col_size+j));代码不懂啥意思。怎么就输出一个item就能输出全部行和列了。void print_maze(char *maze,int row_size,int col_size){ int i; int j; char item; for(i=0;i<row_size;i++){ for(j=0;j<col_size;j++){ item=*(maze+(i*col_size+j)); printf("%c ",item); } printf("\n"); printf("\n"); }}void main(void){ // 示例迷宫 char maze[9][9]={ {'#','#','#','#','#','#','#','#','#'}, {'#','@','#','#','@','@','@','@','#'}, {'#','@','@','@','@','#','#','#','#'}, {'#','@','#','#','@','@','@','@','#'}, {'#','@','@','@','#','#','#','#','#'}, {'#','#','#','@','@','@','@','@','#'}, {'#','#','#','#','#','@','#','@','#'}, {'#','#','#','#','#','@','#','@','#'}, {'#','#','#','#','#','#','#','#','#'},}; print_maze(&maze[0][0],9,9); }

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Answer 1

#include <stdio.h>
void print_maze(char *maze,int row_size,int col_size)
{
	int i;	int j;	
	char item;	
	for(i=0;i<row_size;i++)
	{	
		for(j=0;j<col_size;j++)
		{
			item=*(maze+(i*col_size+j));	//这是查二维数组 的代码 
											//maze 数组的起始地址 
			printf("%c ",item);
		}	
		printf("\n");	
		printf("\n");	
	}
}
int main(void)	// 示例迷宫	
{
	char maze[9][9]=
	{	
		{'#','#','#','#','#','#','#','#','#'},	
		{'#','@','#','#','@','@','@','@','#'}, 
		{'#','@','@','@','@','#','#','#','#'},	
		{'#','@','#','#','@','@','@','@','#'},	
		{'#','@','@','@','#','#','#','#','#'}, 
		{'#','#','#','@','@','@','@','@','#'},	
		{'#','#','#','#','#','@','#','@','#'},	
		{'#','#','#','#','#','@','#','@','#'}, 
		{'#','#','#','#','#','#','#','#','#'},
	};	
	print_maze(&maze[0][0],9,9);	
	return 0;
}

Answer 2

因为这里的item是一个字符指针，随着二重循环的进行，它扫描整个二维数组，输出其中的每一个字符，所以，它能输出整个二维数组。