我试图实现生活的游戏,重点在于效率,以及模式匹配的功能。模式是闪光灯,滑翔机,十字架等用边界条件导航映射到1D的2D阵列
我有一个世界的一维数组,以及宽度和高度。为了找到我想要计算Moore邻域的索引的邻居,然后检查它们是否为散列,如果它们增加了get_neighbours函数的返回变量。南北方似乎有效,但东方和西方不起作用。 NE,SE,SW,NW都基于先前的逻辑(即,在西部向北)。
int get_neighbours(int loc) {
int neighbours = 0;
int n = mod(loc - grid_width, total);
int e = mod(loc + 1, grid_width) + grid_width;
int s = mod(loc + grid_width, total);
int w = mod(loc - 1, grid_width) + grid_width;
int nw = mod(w - grid_width, total);
int ne = mod(e - grid_width, total);
int se = mod(e + grid_width, total);
int sw = mod(w + grid_width, total);
//Northwest
if (grid[nw] == '#') {
neighbours++;
}
//North
if (grid[n] == '#') {
neighbours++;
}
//Northeast
if (grid[ne] == '#') {
neighbours++;
}
//East
if (grid[e] == '#') {
neighbours++;
}
//Southeast
if (grid[se] == '#') {
neighbours++;
}
//South
if (grid[s] == '#') {
neighbours++;
}
//Southwest
if (grid[sw] == '#') {
neighbours++;
}
//West
if (grid[w] == '#') {
neighbours++;
}
return neighbours;
}
int mod(int a, int b) {
int ret = a % b;
if (b < 0) {
return mod(-a, -b);
}
else if (ret < 0) {
ret += b;
}
return ret;
}
对于模式匹配,我试图使用与上面相同的逻辑来构建5x5子数组。这基本上使用“读头”。从所提供的位置向东行进,直到它移动了5个空间。然后,它返回到原始位置,向南移动正确的行数,然后再向东移动,直到我们收集了25个索引。
char *get_subarray(int loc) {
char *subarray;
subarray = malloc(sizeof(char) * 25);
int i = 0;
int ptr = loc;
while (i < 25) {
subarray[i] = grid[ptr];
if ((i + 1) % 5 == 0) {
//return the read head to the original location, then travel south through the grid once for each of the times we have traversed a row
ptr = loc;
for (int k = 0; k <= (i/5); k++) {
ptr = mod(ptr + grid_width, total);
}
} else {
ptr = mod(ptr + 1, grid_width) + grid_width;
}
i++;
}
subarray[i] = '\0';
return subarray;
}
至于它这样做,它建立在世界上的子阵列,那么我可以strcmp()的这对字符串的模式。
int cpu_get_crosses() {
int crosses = 0;
for (int i = 0; i < total; i++) {
if (strcmp(get_subarray(i), " # # # # ") == 0) {
crosses++;
}
}
return crosses;
}
作为参考,7X5网格指数(含边界):
34|28 29 30 31 32 33 34|28
--|--------------------|--
6 |0 1 2 3 4 5 6 |0
13|7 8 9 10 11 12 13|7
20|14 15 16 17 18 19 20|14
27|21 22 23 24 25 26 27|21
34|28 29 30 31 32 33 34|28
--|--------------------|--
6 |0 1 2 3 4 5 6 |0
我很好奇,可以让我来计算摩尔附近的指数,同时保留的边界是什么逻辑条件,以便我可以正确计算邻居和子数组(因为这两者都使用相同的逻辑)。
编辑:如果任何googlers需要它的子数组函数。
char *get_subarray(int loc) {
char *subarray;
subarray = malloc(sizeof(char) * 25); //5x5 (=25) subarray
int i = 0;
int row = loc/grid_width;
int ptr = loc;
while (i < 25) {
subarray[i] = grid[ptr];
if ((i + 1) % 5 == 0) {
//return the read head to the original location, then travel south through the grid once for each of the times we have traversed a row
ptr = loc;
for (int k = 0; k <= (i/5); k++) {
ptr = mod(ptr + grid_width, total);
}
row = ptr/grid_width;
} else {
ptr = mod(ptr + 1, grid_width) + row * grid_width;
}
i++;
}
subarray[i] = '\0';
return subarray;
}
你的问题到底是什么? – Fjotten
@Fjotten哎呀。清晨。编辑的问题。 – Jack
@BeyelerStudios对不起,这是复制和粘贴时的另一个错误,因为我正处于混乱中。检查过后,不应该有任何更多的错误。感谢提高效率的提示,我会在有机会的时候检查一下。 – Jack