引用自定义头文件
>>> test.h
#define ROW 3
#define COL 3
>>> test.c
#include
#include "test.h"
int main()
{
char board[ROW][COL];
}
/Users/liuxuanxin/Documents/C/C_Learning/test.c:6:16: error: use of undeclared identifier 'ROW'
char board[ROW][COL];
^
/Users/liuxuanxin/Documents/C/C_Learning/test.c:6:21: error: use of undeclared identifier 'COL'
char board[ROW][COL];
^
2 errors generated.
引入自定义头文件后运行不报错
头文件换个名试试