Dijkstra算法
#include <iostream> #include <vector> using namespace std; struct Line { int Vs; int Vt; }; void main() { int i,j,sourse,temp,min,min_node; int node = 8; int inf = 100; int Graph[8][8] = {0, 2, 1, 8, 100, 100, 100, 100, 2, 0, 100, 6, 1, 100, 100, 100, 1, 100, 0, 7, 100, 100, 9, 100, 8, 6, 7, 0, 5, 1, 2, 100, 100, 1, 100, 5, 0, 3, 100, 9, 100, 100, 100, 1, 3, 0, 4, 6, 100, 100, 9, 2, 100, 4, 0, 3, 100, 100, 100, 100, 9, 6, 3, 0 }; int w[8] = {0}; int flag[8] = {0}; int influence_node[8] = {0}; for(i = 0; i < node; i ++) w[i] = inf; vector< Line > line_set; cout << "please input the sourse :"; cin >> sourse; Line line_1,line_2; line_1.Vs = sourse; line_1.Vt = sourse; line_set.push_back(line_1); w[sourse] = 0; flag[sourse] = 1; int num = node; while(num - 1) { line_1 = line_set.back(); for(j = 0; j < node; j ++) { if(flag[j] == 0) { temp = Graph[line_1.Vt][j] + w[line_1.Vt]; if(temp < w[j]) { w[j] = temp; influence_node[j] = line_1.Vt; } } } min = 100; for(j = 0; j < node; j ++) { if(flag[j] == 0) { if(w[j] < min) { min = w[j]; min_node = j; } } } flag[min_node] = 1; line_2.Vs = influence_node[min_node]; line_2.Vt = min_node; line_set.push_back(line_2); num --; } vector< Line >::iterator it; for(it = line_set.begin(); it != line_set.end(); it ++) { cout << it->Vs << " " << it->Vt << endl; } }
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