在 C 中存储网格坐标的最佳方法是什么？

Question

I am currently writing a game of battleship as a project for a class. What is the best way to store coordinates for ship locations? The ocean is a 10x10 grid square with letters going horizontally and numbers vertically. I need to store the coordinates of each ship. For example, the carrier has 5 spaces so A1, B1, C1, D1, and E1. If I do this in an array, I would somehow have to break up the A1 into a char and an int. Correct? Is there a better way to do this? Thanks in advance.

Answer 1

you can use a structure:

struct point{
    int m_vertical;
    char m_horizon;
}

any way you need to do some effort before you ask a question. Please do some effort and try to search and dig in the webs before asking. good luck

Answer 2

What you have to do here is translate those letters and numbers into array positions.

Take the example of E2 . E is the 5th letter of the alphabet, so it could represent the 5th row of your ocean. The same goes for the numbers, although you don't need any translation there, so 2 is the 2nd column. Now, if you remember that array indexes start at 0, the 5th row is actually at the 4th index, and the 2nd column is at the 1st index. So, E2 represents ocean[4][1] (or ocean[1][4] , depending on your representation);

With that being said, to turn something like E2 into coordinates you can do something like this:

char pos[2] = {'E', '2'};
int col = pos[0] - 'A';
int row = pos[1] - '0';

// now you can access your ocean with something like ocean[col][row]

What I'm doing here is taking the ASCII code of the letter E and subtracting the ACSII code of the letter A from it. The same for '2' and '0'. This works because ASCII codes from 'A' to 'Z' go from 65 to 90, in order, and ASCII codes for '0' to '9' go from 48 to 57.