图算法之图的最长路径_图最长路径

来自UNSW的一个C语言大作业，滴滴滴滴滴滴

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdbool.h>

typedef struct GraphRep *Graph;

// vertices are ints
typedef int Vertex;

// edges are pairs of vertices (end-points)
typedef struct Edge {
    Vertex v;
    Vertex w;
} Edge;

typedef struct GraphRep {
    int  **edges;   // adjacency matrix
    int    nV;      // #vertices
    int    nE;      // #edges
} GraphRep;

bool found;

Graph newGraph(int V) {
    assert(V >= 0);
    int i;

    Graph g = (Graph )malloc(sizeof(GraphRep));
//  Graph g = NULL;
    assert(g != NULL);
    g->nV = V;
    g->nE = 0;

    // allocate memory for each row
    g->edges =(int **) malloc(V * sizeof(int *));
    assert(g->edges != NULL);
    // allocate memory for each column and initialise with 0
    for (i = 0; i < V; i++) {
        g->edges[i] =(int *)calloc(V, sizeof(int));
        assert(g->edges[i] != NULL);
    }

    return g;
}

// check if vertex is valid in a graph
bool validV(Graph g, Vertex v) {
    return (g != NULL && v >= 0 && v < g->nV);
}

void insertEdge(Graph g, Edge e) {
    assert(g != NULL && valid
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