#ifndef LONG_PATH_H#define LONG_PATH_H#include<iostream>#include<string>#define MAX 65535int graphPath_longest(int (*Graph)[5],int Length,int origin,int destin );void printf_path(int origin,int destin);#endif
#include"LongPath.h"#define Max(a,b) a>b? a:bint pathStore[20];int graphPath_longest(int (*Graph)[5],int Length,int origin,int destin){int pathLength=-1;for(int i=0;i<Length; i++){if(Graph[origin][i]!=0&&Graph[origin][i]!=MAX&&origin!=destin){if(graphPath_longest(Graph,Length,i,destin)+Graph[origin][i]>pathLength){pathLength=graphPath_longest(Graph,Length,i,destin)+Graph[origin][i];pathStore[origin]=i;}}else if(origin==destin){pathStore[origin]=destin;pathLength=Max(0,pathLength);}}return pathLength;}void printf_path(int origin,int destin){int n=origin;std::cout<<"the longest path in Graph from node "<<origin<<" to node "<<destin<<std::endl;std::cout<<origin;while(n!=destin){n=pathStore[n];std::cout<<"->"<<n;}std::cout<<std::endl;}
#include "LongPath.h"int main(){int Graph[5][5]={MAX};Graph[0][0]=0;Graph[0][4]=6;Graph[1][0]=9;Graph[1][1]=0;Graph[1][2]=3;Graph[2][0]=10;Graph[2][2]=0;Graph[2][3]=5;Graph[3][3]=0;Graph[3][4]=1;Graph[4][4]=0;std::cout<<"The longest path value "<<graphPath_longest(Graph,5,1,4)<<std::endl;printf_path(1,4);}
pathLength=graphPath_longest(Graph,Length,i,destin)+Graph[origin][i]; pathStore[origin]=i; } std::cout<<origin; while(n!=destin){ n=pathStore[n]; std::cout<<"->"<<n; }上面的代码就是循环输出的。原文：http://www.cnblogs.com/yml435/p/4655527.html