请使用C语言编写以下算法的代码:首先将任意关系通过关系矩阵表示,关系的自反闭包只需将矩阵的主对角线元素全部置为1;关系的对称闭包即关系矩阵与其转置矩阵进行加法运算(逻辑加);关系的传递闭包转化为矩阵的计算,计算公式为 Mt = M + M2 + M3 + …(逻辑加) 其中M为关系矩阵,Mt为传递闭包的矩阵。 关系的传递闭包也可用Floyd-Warshall算法计算,效率更高,Floyd-Warshall算法原理为: 设R的关系矩阵为n阶矩阵M,传递闭包矩阵为A = A[j, k], (1)令矩阵A = M; (2) for i=1 to n do { for j=1 to n do { if A[j, i]=1, then { for k=1 to n do A[j, k] = A[j, k] || A[i, k];} // 运算符||为逻辑或 } }
时间: 2024-03-18 17:46:02 浏览: 85
以下是使用C语言编写的关系矩阵及闭包算法代码,包括自反闭包、对称闭包和传递闭包的计算:
```c
#include <stdio.h>
#include <stdlib.h>
#define MAX_SIZE 100
void print_matrix(int matrix[MAX_SIZE][MAX_SIZE], int size) {
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
printf("%d ", matrix[i][j]);
}
printf("\n");
}
}
void reflexive_closure(int matrix[MAX_SIZE][MAX_SIZE], int size) {
for (int i = 0; i < size; i++) {
matrix[i][i] = 1;
}
}
void symmetric_closure(int matrix[MAX_SIZE][MAX_SIZE], int size) {
int temp_matrix[MAX_SIZE][MAX_SIZE];
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
temp_matrix[i][j] = matrix[i][j] || matrix[j][i];
}
}
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
matrix[i][j] = temp_matrix[i][j];
}
}
}
void transitive_closure(int matrix[MAX_SIZE][MAX_SIZE], int size) {
int temp_matrix[MAX_SIZE][MAX_SIZE];
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
temp_matrix[i][j] = matrix[i][j];
}
}
for (int k = 0; k < size; k++) {
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
matrix[i][j] = matrix[i][j] || (temp_matrix[i][k] && temp_matrix[k][j]);
}
}
}
}
int main() {
int size;
printf("Enter the size of the matrix: ");
scanf("%d", &size);
int matrix[MAX_SIZE][MAX_SIZE];
printf("Enter the elements of the matrix: \n");
for (int i = 0; i < size; i++) {
for (int j = 0; j < size; j++) {
scanf("%d", &matrix[i][j]);
}
}
printf("Original matrix:\n");
print_matrix(matrix, size);
reflexive_closure(matrix, size);
printf("Reflexive closure:\n");
print_matrix(matrix, size);
symmetric_closure(matrix, size);
printf("Symmetric closure:\n");
print_matrix(matrix, size);
transitive_closure(matrix, size);
printf("Transitive closure:\n");
print_matrix(matrix, size);
return 0;
}
```
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