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old.cpp

#include <iostream>
#include <fstream>
#include <math.h>
using namespace std;

int main(void) {
	ofstream fp5;
    fp5.open ("Laplace100.txt");
	int Max(11);
	double V[20000];
	double diff(1.0);

	V[1]=0;
	V[2]=7;
	V[3]=25;
	V[4]=32;
	V[5]=39;
	V[6]=42;
	V[7]=55;
	V[8]=70;
	V[9]=82;
	V[10]=93;
	V[11]=100;


	while (diff >= .01) {
		for(int i = Max; i > 1; i--) {
			V[2*i-1] = V[i];
	
		}
		Max = 2*Max-1;
		for(int j = 2; j< Max; j=j+2) {
			V[j] =.5*(V[j-1]+V[j+1]);
		
		}
		diff= fabs(V[5]-V[4]);
		
	}
	for(int k=1; k<=Max; k++) {
		fp5 << k << " " << V[k] << endl;
	}
	fp5.close();
	return 0;
}