Fleury算法是解决欧拉回路问题的经典算法之一。在无向图中,如果所有顶点的度数都是偶数,或者恰好有两个顶点的度数是奇数,那么这个图就被称为欧拉图,并且存在欧拉回路。Fleury算法通过系统地遍历这些...
Fleury算法是解决欧拉回路问题的经典算法之一。在无向图中,如果所有顶点的度数都是偶数,或者恰好有两个顶点的度数是奇数,那么这个图就被称为欧拉图,并且存在欧拉回路。Fleury算法通过系统地遍历这些边来构造欧拉回路。
以下是使用C语言实现Fleury算法的实战攻略,帮助读者轻松掌握图遍历技巧。
Fleury算法的基本思想是:
在C语言中,我们需要设计合适的数据结构来表示图和进行图的遍历。以下是一个简单的图表示方法:
#include
#include
#define MAX_VERTICES 100
#define INF 9999
typedef struct { int numVertices; int **adjMatrix;
} Graph;
Graph* createGraph(int numVertices) { Graph *graph = (Graph*)malloc(sizeof(Graph)); graph->numVertices = numVertices; graph->adjMatrix = (int**)malloc(numVertices * sizeof(int*)); for (int i = 0; i < numVertices; i++) { graph->adjMatrix[i] = (int*)malloc(numVertices * sizeof(int)); for (int j = 0; j < numVertices; j++) { graph->adjMatrix[i][j] = (i == j) ? 0 : INF; } } return graph;
}
void addEdge(Graph *graph, int src, int dest) { graph->adjMatrix[src][dest] = 1; graph->adjMatrix[dest][src] = 1;
}
void freeGraph(Graph *graph) { for (int i = 0; i < graph->numVertices; i++) { free(graph->adjMatrix[i]); } free(graph->adjMatrix); free(graph);
} void fleuryTraversal(Graph *graph, int startVertex) { int *visited = (int*)calloc(graph->numVertices, sizeof(int)); int *path = (int*)malloc(graph->numVertices * sizeof(int)); int pathIndex = 0; int currentVertex = startVertex; while (currentVertex != -1) { int nextVertex = -1; for (int i = 0; i < graph->numVertices; i++) { if (graph->adjMatrix[currentVertex][i] != 0 && !visited[i]) { nextVertex = i; break; } } if (nextVertex == -1) { currentVertex = -1; } else { path[pathIndex++] = currentVertex; visited[currentVertex] = 1; visited[nextVertex] = 1; graph->adjMatrix[currentVertex][nextVertex] = 0; graph->adjMatrix[nextVertex][currentVertex] = 0; currentVertex = nextVertex; } } printf("Path: "); for (int i = 0; i < pathIndex; i++) { printf("%d ", path[i]); } printf("\n"); free(visited); free(path);
}int main() { Graph *graph = createGraph(4); addEdge(graph, 0, 1); addEdge(graph, 1, 2); addEdge(graph, 2, 3); addEdge(graph, 3, 0); fleuryTraversal(graph, 0); freeGraph(graph); return 0;
}通过以上实战攻略,读者可以轻松掌握使用C语言实现Fleury算法的方法。在实际编程过程中,可以根据具体需求对算法进行优化和调整。