Programming C++ Algoritma Prim's Menentukan Minimum Spanning Tree
#include <cstdlib>
#include <iostream>
using namespace std;
class prims{
private:
int n;
int graph_edge[250][4];
int g;
int tree_edge[250][4];
int t;
int s;
int T1[50],t1;
int T2[50],t2;
public:
void input();
int findset(int);
void algorithm();
void output();
};
void prims::input(){
cout<<"*********************************************\n";
cout<<"*This Program Inplements the prims algorithm*\n";
cout<<"*********************************************\n\n";
cout<<"Enter the no. of nodes in the undirected weighted graph : ";
cin>>n;
g=0;
cout<<"Enter the weights for the following edges : \n";
for(int i=1;i<=n;i++){
for(int j=i+1;j<=n;j++){
cout<<"< "<<i<<", "<<j<<" > : ";
int w;
cin>>w;
if(w!=0){
g++;
graph_edge[g][1]=1;
graph_edge[g][2]=j;
graph_edge[g][3]=w;
}
}
}
cout<<"\n\nThe edges in the given graph are : \n";
for(int i=1;i<=g;i++){
cout<<"< "<<graph_edge[i][1]<<" , "<<graph_edge[i][2]<<" > : "<<graph_edge[i][3]<<endl;
}
}
int prims::findset(int x){
for(int i=1;i<=t1;i++){
if(x==T1[i]) return 1;
}
for(int i=1;i<=t2;i++){
if(x==T2[i]) return 2;
}
return -1;
}
void prims::algorithm(){
t=0;
t1=1;
T1[1]=1;
t2=n-1;
int i;
for(i=1;i<=n;i++){
T2[i]=i+1;
}
cout<<"\nThe Algorithm starts\n\n";
while(g!=0 && t!=n-1){
int min=9999;
int p;
int u,v,w;
for(int i=1;i<=g;i++){
bool flag1 = false, flag2 = false;
if(findset(graph_edge[i][1])!=findset(graph_edge[i][2])){
if(min>graph_edge[i][3]){
min=graph_edge[i][3];
u=graph_edge[i][1];
v=graph_edge[i][2];
w=graph_edge[i][3];
p=i;
}
}
}
cout<<"The edge include in the tree is : ";
cout<<"< "<<u<<", "<<v<<" >\n";
for(int l=p;l<g;l++){
graph_edge[l][1]=graph_edge[l+1][1];
graph_edge[l][2]=graph_edge[l+1][2];
graph_edge[l][3]=graph_edge[l+1][3];
}
g--;
t++;
tree_edge[t][1]=u;
tree_edge[t][2]=v;
tree_edge[t][3]=w;
t++;
int m;
if(findset(v)==2){
T1[t1]=v;
m=v;
}
else if(findset(u)==2){
T1[t1]=u;
m=u;
}
int x;
for(x=1;T2[x]!=m;x++){
for(;x<t2;x++){
T2[x]=T2[x+1];
}
}
t2--;
int k;
cout<<"NOW\nT1 : ";
for(k=1;k<=t1;k++) cout<<T1[k]<<" ";
cout<<endl;
cout<<"T2 : ";
for(k=1;k<=t2;k++) cout<<T2[k]<<" ";
cout<<endl;
cout<<"The graph edges are : \n";
for(int i=1;i<=g;i++){
cout<<"< "<<graph_edge[i][1]<<", "<<graph_edge[i][2]<<" > : "<<graph_edge[i][3]<<endl;
}
cout<<"\n\n";
}
}
void prims::output(){
cout<<"\nThe selected edges are : \n";
for(int i=1;i<=t;i++){
cout<<"< "<<tree_edge[i][1]<<", "<<tree_edge[i][2]<<" > : "<<tree_edge[i][3]<<endl;
}
}
int main(int argc, char *argv[])
{
awal:
prims dyas;
dyas.input();
dyas.algorithm();
dyas.output();
char L;
cout<<"\n\nLanjut? : ";
cin>>L;
if(L=='y') {
system("cls");
goto awal;
}
system("PAUSE");
return EXIT_SUCCESS;
}
2 komentar:
Ini outputnya gimana?
@Dhiya : langsung dicoba saja
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