路径规划是一个复杂的问题，需要使用一些算法来实现。下面是一个简单的示例，使用Dijkstra算法来实现路径规划。

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

#define MAX_NODES 100
#define INF INT_MAX

typedef struct {
    int cost;
    int next;
} Edge;

typedef struct {
    int numEdges;
    Edge edges[MAX_NODES][MAX_NODES];
} Graph;

void initGraph(Graph* graph, int numNodes) {
    graph->numEdges = numNodes;
    for (int i = 0; i < numNodes; ++i) {
        for (int j = 0; j < numNodes; ++j) {
            graph->edges[i][j].cost = INF;
            graph->edges[i][j].next = -1;
        }
    }
}

void addEdge(Graph* graph, int from, int to, int cost) {
    graph->edges[from][to].cost = cost;
    graph->edges[from][to].next = to;
}

void dijkstra(Graph* graph, int source, int dest) {
    int numNodes = graph->numEdges;
    int visited[MAX_NODES] = { 0 };
    int distance[MAX_NODES];
    int previous[MAX_NODES];

    for (int i = 0; i < numNodes; ++i) {
        distance[i] = INF;
        previous[i] = -1;
    }

    distance[source] = 0;

    for (int i = 0; i < numNodes; ++i) {
        int min_distance = INF;
        int current_node = -1;

        for (int j = 0; j < numNodes; ++j) {
            if (!visited[j] && distance[j] < min_distance) {
                min_distance = distance[j];
                current_node = j;
            }
        }

        if (current_node == -1) {
            break;
        }
        
        visited[current_node] = 1;

        for (int j = 0; j < numNodes; ++j) {
            if (graph->edges[current_node][j].cost != INF) {
                int new_distance = distance[current_node] + graph->edges[current_node][j].cost;
                if (new_distance < distance[j]) {
                    distance[j] = new_distance;
                    previous[j] = current_node;
                }
            }
        }
    }

    if (distance[dest] == INF) {
        printf("No path found from %d to %d\n", source, dest);
    } else {
        printf("Shortest path from %d to %d: ", source, dest);
        int current_node = dest;
        while (current_node != -1) {
            printf("%d ", current_node);
            current_node = previous[current_node];
        }
        printf("\n");
    }
}

int main() {
    Graph graph;
    initGraph(&graph, 6);

    addEdge(&graph, 0, 1, 7);
    addEdge(&graph, 0, 2, 9);
    addEdge(&graph, 0, 5, 14);
    addEdge(&graph, 1, 2, 10);
    addEdge(&graph, 1, 3, 15);
    addEdge(&graph, 2, 3, 11);
    addEdge(&graph, 2, 5, 2);
    addEdge(&graph, 3, 4, 6);
    addEdge(&graph, 4, 5, 9);

    dijkstra(&graph, 0, 4);

    return 0;
}

这个示例中，我们先定义了一个图结构，并初始化了一些边。然后使用Dijkstra算法来计算从指定源节点到目标节点的最短路径。最后输出路径的节点。

这只是一个简单的示例，实际的路径规划可能需要更复杂的算法和数据结构来处理。有关更高级的路径规划算法，你可以了解一下A*算法、Bellman-Ford算法等。