C语言 如何在C中定位输入文本光标？
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How to position the input text cursor in C?
提问by It'sRainingMen
Here I have a very simple program:
这里我有一个非常简单的程序：
printf("Enter your number in the box below\n");
scanf("%d",&number);
Now, I would like the output to look like this:
现在，我希望输出如下所示：
Enter your number in the box below
+-----------------+
| |*| |
+-----------------+
Where, |*| is the blinking cursor where the user types their value.
哪里，|*| 是用户键入其值的闪烁光标。
Since C is a linear code, it won't print the box art, then ask for the output, it will print the top row and the left column, then after the input print the bottom row and right column.
由于C是一个线性代码，它不会打印盒子艺术，然后要求输出，它会打印顶行和左列，然后在输入后打印底行和右列。
So, my question is, could I possibly print the box first, then have a function take the cursor back into the box?
所以，我的问题是，我可以先打印盒子，然后让函数将光标带回盒子吗？
回答by David Ranieri
If you are under some Unix terminal (xterm, gnome-terminal...), you can use console codes:
如果您在某个 Unix 终端 ( xterm, gnome-terminal...) 下，您可以使用控制台代码：
#include <stdio.h>
#define clear() printf("3[H3[J")
#define gotoxy(x,y) printf("3[%d;%dH", (y), (x))
int main(void)
{
int number;
clear();
printf(
"Enter your number in the box below\n"
"+-----------------+\n"
"| |\n"
"+-----------------+\n"
);
gotoxy(2, 3);
scanf("%d", &number);
return 0;
}
Or using Box-drawing characters:
或使用Box-drawing 字符：
printf(
"Enter your number in the box below\n"
"╔═════════════════╗\n"
"║ ║\n"
"╚═════════════════╝\n"
);
More info:
更多信息：
man console_codes
回答by Cantfindname
In the linux terminal you may use terminal commands to move your cursor, such as
在 linux 终端中，您可以使用终端命令来移动光标，例如
printf("\033[8;5Hhello"); // Move to (8, 5) and output hello
printf("\033[8;5Hhello"); // Move to (8, 5) and output hello
other similar commands:
其他类似的命令：
printf("3[XA"); // Move up X lines;
printf("3[XB"); // Move down X lines;
printf("3[XC"); // Move right X column;
printf("3[XD"); // Move left X column;
printf("3[2J"); // Clear screen
Keep in mind that this is not a standardised solution, and therefore your code will not be platform independent.
请记住，这不是标准化的解决方案，因此您的代码不会独立于平台。
