#include<iomanip>
#include<cmath>
#include<iostream>
using namespace std;
struct newElement {
double k;
double c;
double l;
double s;
double H[2][2];
double P[2];
};
const double eps = 1e-12;
void print(double **tab, int length) {
for (int i = 0; i < length; i++) {
for (int j = 0; j < length; j++) {
cout << tab[i][j] << "\t";
}
cout << endl;
}
}
void printVec(double *tab, int length) {
for (int i = 0; i < length; i++) {
cout << tab[i] << "\t";
cout << endl;
}
}
bool gauss(int n, double **AB, double *X)
{
int j, k, i;
double m, s;
for (i = 0; i < n - 1; i++)
{
for (j = i + 1; j < n; j++)
{
if (fabs(AB[i][i]) < eps) return false;
m = -AB[j][i] / AB[i][i];
for (k = i + 1; k <= n; k++)
AB[j][k] += m * AB[i][k];
}
}
for (i = n - 1; i >= 0; i--)
{
s = AB[i][n];
for (j = n - 1; j >= i + 1; j--)
s -= AB[i][j] * X[j];
if (fabs(AB[i][i]) < eps) return false;
X[i] = s / AB[i][i];
}
return true;
}
int main()
{
int me = 2;
newElement *element = new newElement[me];
double **HG = new double *[me + 1];
for (int j = 0; j <= me; j++) {
HG[j] = new double[me + 2];
}
double *PG = new double[me + 1];
double k = 50;
double l = 2.5;
double s = 2;
double t = 400;
double q = -150;
double alfa = 10;
for (int i = 0; i <= me; i++) {
for (int j = 0; j <= me; j++) {
HG[i][j] = 0;
}
}
for (int j = 0; j <= me; j++) {
PG[j] = 0;
}
for (int i = 0; i < me; i++) {
element[i].k = k;
element[i].s = s;
element[i].l = l;
element[i].c = element[i].k * element[i].s / element[i].l;
element[i].P[0] = 0;
element[i].P[1] = 0;
element[i].H[0][0] = element[i].c;
element[i].H[0][1] = -(element[i].c);
element[i].H[1][0] = -(element[i].c);
element[i].H[1][1] = element[i].c;
}
element[me - 1].H[1][1] += alfa*s;
element[0].P[0] -= q*s;
element[me - 1].P[1] += alfa * s * t;
for (int i = 0; i < me; i++) {
HG[i][i] += element[i].H[0][0];
HG[i][i + 1] += element[i].H[0][1];
HG[i + 1][i] += element[i].H[1][0];
HG[i + 1][i + 1] += element[i].H[1][1];
PG[i] += element[i].P[0];
PG[i + 1] += element[i].P[1];
}
for (int i = 0; i <= me; i++) {
HG[i][me + 1] = PG[i];
}
print(HG, me + 1);
cout << endl;
cout << endl;
printVec(PG, me + 1);
double *X = new double[me + 1];
gauss(me + 1, HG, X);
cout << endl;
cout << endl;
printVec(X, me + 1);
system("pause");
return 0;
}
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