C语言 C 二维数组
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C Two-Dimensional Array
提问by aer
I'm going to ask something about my code provided below... My question is in the line where there's a comment /*This line*/. I used variable y and x: y for the HEIGHT and x for the WIDTH. The very first time I run the program, the code was scanf("%d,%d", &y, &x);but unfortunately, the program was not running properly. But when I modified the code with this scanf("%d,%d", &x, &y);, then, I was able to run the program in turn. I can't understand how it happened, since I had set the y as HEIGHT and x as WIDTH?
我要问一些关于我下面提供的代码的问题......我的问题是在有评论的行中/*This line*/。我使用变量 y 和 x：y 表示高度，x 表示宽度。我第一次运行程序时，代码是scanf("%d,%d", &y, &x);但不幸的是，程序运行不正常。但是当我用 this 修改代码时scanf("%d,%d", &x, &y);，我能够依次运行程序。我无法理解它是如何发生的，因为我将 y 设置为 HEIGHT，将 x 设置为 WIDTH？
File Edit Run Compile Project Options Debug Break/watch
╒════════════════════════════════════ Edit ════════════════════════════════════╕
│ Line 1 Col 43 Insert Indent Tab Fill Unindent * C:NONAME.C │
│#define HEIGHT 5 │
│#define WIDTH 10 │
│ │
│char enemy[HEIGHT][WIDTH]= │
│ { {0,0,0,0,0,0,0,0,0,0}, │
│ {0,1,1,0,0,1,0,0,0,0}, │
│ {0,0,0,1,0,1,0,1,1,0}, │
│ {0,0,0,0,0,0,0,0,1,1}, │
│ {0,0,1,1,0,1,0,0,0,1} }; │
│ │
│main() │
│{ │
│ char friend[HEIGHT][WIDTH]; │
│ int x,y; │
│ │
│ clrscr(); │
│ │
│ for(y=0; y<HEIGHT; y++) |
| for(x=0; x<WIDTH; x++) |
| friend[y][x]='.'; |
| |
| while(x >= 0) |
| { |
| for(y=0; y<HEIGHT; y++) |
| { |
| for(x=0; x<WIDTH; x++) |
| printf("%c", friend[y][x]); |
| printf("\n"); |
| } |
| |
| printf("Coordinates: "); |
| scanf("%d,%d", &x, &y); /*This line*/ |
| |
| if(enemy[y][x] == 1) |
| friend[y][x]="\xDB"; |
| else |
| friend[y][x]="\xB0"; |
| } |
|} │
├─────────────────────────────────── Watch ────────────────────────────────────┤
│ │
└──────────────────────────────────────────────────────────────────────────────┘
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回答by Baltasarq
The problem is the input data. 5,2 meant row 5, column 2, and the problem is that row 5 does not exist (Height is 5, so you have rows from 0 to 4). As soon as you changed the values, they became 2, 5, which correctlypoint to row 2 (third row) and column 5 (sixth column).
问题是输入数据。5,2 表示第 5 行第 2 列，问题是第 5 行不存在（高度为 5，因此您有 0 到 4 行）。一旦您更改了这些值，它们就会变成 2、5，它们正确地指向第 2 行（第三行）和第 5 列（第六列）。
回答by Pushpendra
If you are using 5 and 2 for y[HEIGHT] and x[WIDTH], How it will work because your enemy[HEIGHT][WIDTH] array is the array of 5x10.
如果您对 y[HEIGHT] 和 x[WIDTH] 使用 5 和 2，它将如何工作，因为您的敌人 [HEIGHT][WIDTH] 数组是 5x10 的数组。
That is when you are using 5 for y that exceeds it limit that is 0 to 4.
那就是当您使用 5 表示超过 0 到 4 的限制时。
Isn't it.....?
是不是……？
