dijkstra求最短路径C++代码

以下是Dijkstra算法的C代码，用于求解最短路径问题：

#include <stdio.h>
#include <limits.h>

#define V 6

int minDistance(int dist[], bool sptSet[]) {
    int min = INT_MAX, min_index;
    for (int v = 0; v < V; v++) {
        if (sptSet[v] == false && dist[v] <= min) {
            min = dist[v];
            min_index = v;
        }
    }
    return min_index;
}

void printSolution(int dist[]) {
    printf("Vertex \t Distance from Source\n");
    for (int i = 0; i < V; i++)
        printf("%d \t %d\n", i, dist[i]);
}

void dijkstra(int graph[V][V], int src) {
    int dist[V];
    bool sptSet[V];
    for (int i = 0; i < V; i++) {
        dist[i] = INT_MAX;
        sptSet[i] = false;
    }
    dist[src] = 0;
    for (int count = 0; count < V - 1; count++) {
        int u = minDistance(dist, sptSet);
        sptSet[u] = true;
        for (int v = 0; v < V; v++) {
            if (!sptSet[v] && graph[u][v] && dist[u] != INT_MAX && dist[u] + graph[u][v] < dist[v]) {
                dist[v] = dist[u] + graph[u][v];
            }
        }
    }
    printSolution(dist);
}

int main() {
    int graph[V][V] = {{0, 2, 4, 0, 0, 0},
                       {2, 0, 1, 4, 2, 0},
                       {4, 1, 0, 0, 3, 0},
                       {0, 4, 0, 0, 3, 2},
                       {0, 2, 3, 3, 0, 2},
                       {0, 0, 0, 2, 2, 0}};
    dijkstra(graph, 0);
    return 0;
}

该代码使用邻接矩阵表示图，使用INT_MAX代表无穷大，其中V为图中顶点数，graph为邻接矩阵，src为起点。