我在编码站点中运行代码并出现以下错误:
解决方案:malloc.c:2369:sysmalloc:断言`(old_top ==(((mbinptr)(((char *)&((av) - > bins [((1) - 1)* 2 ])) - __builtin_offsetof(struct malloc_chunk,fd))))&& old_size == 0)|| ((unsigned long)(old_size)> =(unsigned long)(((__ builtin_offsetof(struct malloc_chunk,fd_nextsize))+((2 *(sizeof(size_t))) - 1))&〜((2 * (sizeof(size_t))) - 1)))&&((old_top) - > size& 0x1)&&((unsigned long)old_end& pagemask)== 0)'失败。 中止(核心倾销)
代码:
#include <stdio.h>
#include <string.h>
#include <math.h>
typedef struct cell
{
int x;
int y;
struct cell *prevcell;
struct cell *nextcell;
}cell;
/* Head ends here */
void nextMove(int x, int y, int pacman_x, int pacman_y, int food_x, int food_y, char grid[x][y]){
//logic here
int i=pacman_x;
int j=pacman_y;
cell *top,*node;
top = NULL;
while(grid[i][j] != '.')
{
node = NULL;
//UP
if(i != 0 && grid[i-1][j] != '%')
{
if(grid[i][j] != 'd')
{
printf("%d %d\n",i,j);
grid[i][j]='d';
}
//push
node = (cell*)malloc(sizeof(node));
node->x=i;
node->y=j;
node->prevcell=top;
node->nextcell=NULL;
if(top != NULL)
top->nextcell=node;
top=node;
i=i-1;
}
//LEFT
else if(j != 0 && grid[i][j-1] != '%')
{
if(grid[i][j] != 'd')
{
printf("%d %d\n",i,j);
grid[i][j]='d';
}
//push
node = (cell*)malloc(sizeof(node));
node->x=i;
node->y=j;
node->prevcell=top;
node->nextcell=NULL;
if(top != NULL)
top->nextcell=node;
top=node;
j=j-1;
}
//RIGHT
else if(j != y-1 && grid[i][j+1] != '%')
{
if(grid[i][j] != 'd')
{
printf("%d %d\n",i,j);
grid[i][j]='d';
}
//push
node = (cell*)malloc(sizeof(node));
node->x=i;
node->y=j;
node->prevcell=top;
node->nextcell=NULL;
if(top != NULL)
top->nextcell=node;
top=node;
j=j+1;
}
//DOWN
else if(i != x-1 && grid[i+1][j] != '%')
{
if(grid[i][j] != 'd')
{
printf("%d %d\n",i,j);
grid[i][j]='d';
}
//push
node = (cell*)malloc(sizeof(node));
node->x=i;
node->y=j;
node->prevcell=top;
node->nextcell=NULL;
if(top != NULL)
top->nextcell=node;
top=node;
i=i+1;
}
else
{
//pop
top=top->prevcell;
free(top->nextcell);
i=top->x;
j=top->y;
}
}
}
/* Tail starts here */
int main() {
int x, y;
int pacman_x, pacman_y;
int food_x, food_y;
scanf( "%d %d", &pacman_x, &pacman_y);
scanf( "%d %d", &food_x, &food_y);
scanf( "%d %d", &x, &y);
char grid[x][y];
for( int i=0; i<x; i++) {
scanf("%s[^\\n]%*c", grid[i]);
}
nextMove( x, y, pacman_x, pacman_y, food_x, food_y, grid);
return 0;
}
我没有得到这个问题。有人可以帮忙吗?
答案 0 :(得分:0)
您的scanf()格式错误。
scanf("%s[^\\n]%*c", grid[i]);
这是对scanf()的说法
1)字符串(%s)
2)角色'['
3)字符'^'
4)字符'\'
5)字符'n'
6)字符']'
7)char(%* c),但不存储它
你可能想放弃's'
scanf("%[^\\n]%*c", grid[i]);
想法:
char buf[80];
fgets(buf, sizeof(buf)-1, stdin);
sscanf(buf, "%[^\\n]", grid[i]);
我发现将Input与解析分开会更安全。
此外,你有
char grid[x][y];
这似乎是基于x&amp;的大小动态分配“网格”。年。这不是C(除非是新功能)。所以我需要问一下,你在使用什么编译器?
答案 1 :(得分:0)
哦......我遇到了这个问题。
以下malloc调用不正确:
node = (cell*)malloc(sizeof(node));
它只分配4个字节(节点是一个指针)。
正确的版本是:
node = (cell*)malloc(sizeof(*node));
OR
node = (cell*)malloc(sizeof(cell));
我多么傻!! !!