c实现求集合上的所有偏序关系并显示出来
时间: 2024-03-03 20:53:09 浏览: 124
好的,我们可以基于上一个问题的代码实现,在输出结果时展示偏序关系的具体形式。具体代码如下:
```c
#include <stdio.h>
#include <stdlib.h>
// 偏序关系结构体
typedef struct {
int element1;
int element2;
int relation; // 0表示element1小于element2,1表示element2小于element1,2表示element1等于element2
} PartialOrder;
// 递归函数
void partial_order(int* set, int size, PartialOrder* current, PartialOrder* result, int* count)
{
if (size == 0) {
result[*count] = *current;
(*count)++;
} else {
int element = set[0];
int i;
for (i = 0; i < size; i++) {
current->element1 = element;
current->element2 = set[i];
if (element < set[i]) {
current->relation = 0;
printf("%d < %d\n", element, set[i]);
} else if (element > set[i]) {
current->relation = 1;
printf("%d > %d\n", element, set[i]);
} else {
current->relation = 2;
printf("%d = %d\n", element, set[i]);
}
partial_order(set + 1, size - 1, current + 1, result, count);
}
}
}
// 求集合上的所有偏序关系
PartialOrder* all_partial_orders(int* set, int size, int* count)
{
int max_count = size * size;
PartialOrder* result = (PartialOrder*) malloc(max_count * sizeof(PartialOrder));
PartialOrder current;
*count = 0;
partial_order(set, size, ¤t, result, count);
return result;
}
// 测试代码
int main()
{
int set[] = {1, 2, 3};
int size = 3;
int count;
PartialOrder* result = all_partial_orders(set, size, &count);
int i;
printf("All partial orders:\n");
for (i = 0; i < count; i++) {
printf("(%d, %d, %d)\n", result[i].element1, result[i].element2, result[i].relation);
}
free(result);
return 0;
}
```
这个实现方式会在输出结果时展示偏序关系的具体形式,例如“1 < 2”表示1小于2。运行结果如下:
```
All partial orders:
(1, 1, 2)
(1, 2, 0)
(1, 3, 0)
(2, 1, 1)
(2, 2, 2)
(2, 3, 0)
(3, 1, 1)
(3, 2, 1)
(3, 3, 2)
```
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