C C++ code : power method - numerical method to find eigen value and vector

Working C C++  Source code program for finding eigen value and eigen vector by power method

/************* Eigen value and eigen vector by Power method ***********/

#include<iostream.h>
#include<conio.h>
#include<math.h>
#include<stdlib.h>

int main()
{
    float a[10][10],x[10],c[10],d=0,temp;
    int n,i,j;

C C++ CODE: Gauss Jordon elimination method to solving linear equations

Working C C++  Source code program for Gauss Jordon elimination method to solving linear equations

/*************** Gauss Jordan method ********************/
#include<iostream.h>
#include<conio.h>
int main()
{
    int i,j,k,n;
    float a[10][10],d;
    clrscr();

    cout<<"No of equations ? ";cin>>n;
    cout<<"Read all coefficients of matrix with b matrix too "<<endl;
    for(i=1;i<=n;i++) // read nxn matrix - cofficients
        for(j=1;j<=n+1;j++)
            cin>>a[i][j];

    /************** partial pivoting **************/
    for(i=n;i>1;i--)
    {
        if(a[i-1][1]<a[i][1])
        for(j=1;j<=n+1;j++)
        {
            d=a[i][j];
            a[i][j]=a[i-1][j];
            a[i-1][j]=d;
        }
    }
    cout<<"pivoted output: "<<endl;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n+1;j++)
            cout<<a[i][j]<<"    ";
        cout<<endl;
    }
    /********** reducing to diagonal  matrix ***********/

    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
        if(j!=i)
        {
            d=a[j][i]/a[i][i];
            for(k=1;k<=n+1;k++)
                a[j][k]-=a[i][k]*d;
        }
    }
    /************** reducing to unit matrix *************/
    for(i=1;i<=n;i++)
    {
    d=a[i][i];
        for(j=1;j<=n+1;j++)
            a[i][j]=a[i][j]/d;
    }


    cout<<"your solutions: "<<endl;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n+1;j++)
            cout<<a[i][j]<<"    ";
        cout<<endl;
    }

    getch();
    return 0;
}

C C++ CODE : Gauss jordan method for finding inverse matrix

Working C C++  Source code program for Gauss jordan method for finding inverse matrix

/*************** Gauss Jordan method for inverse matrix ********************/
#include<iostream.h>
#include<conio.h>
int main()
{
    int i,j,k,n;
    float a[10][10]={0},d;
    clrscr();

C C++ CODE : LU Decomposition for solving linear equations

Working C C++  Source code program for LU Decomposition for solving linear equations

/************** LU Decomposition for solving linear equations ***********/
#include<iostream.h>
#include<conio.h>
int main()
{
    int n,i,k,j,p;
    float a[10][10],l[10][10]={0},u[10][10]={0},sum,b[10],z[10]={0},x[10]={0};
    clrscr();
    cout<<"Enter the order of matrix ! ";
    cin>>n;

C C++ CODE : Gauss elimination for solving linear equations

Working C C++  Source code program for Gauss elimination for solving linear equations

/************* Gauss elimination for solving linear equations *************/

#include<iostream.h>
#include<stdio.h>
#include<conio.h>
#include<math.h>
int main()
{
    int n,i,j,k,temp;
    float a[10][10],c,d[10]={0};
    clrscr();
    cout<<"No of equation ? ";
    cin>>n;

C C++ CODE : least square fitting regression

Working C C++  Source code program for least square fitting regression

/*************** least square fitting ******************/
#include<iostream.h>
#include<conio.h>
#include<math.h>
int main()
{
    int n,i,j;
    float a,a0,a1,x[10],f[10],sumx=0,sumy=0,sumxy=0,sumx2=0;
    clrscr();
    cout<<"Enter no of sample points ? ";cin>>n;

C C++ CODE: Lagrange's interpolation

Working C C++  Source code program for Lagrange's interpolation

/********** Lagrange's interpolation ***************/

#include<iostream.h>
#include<conio.h>
int main()
{
    int n,i,j;
    float mult,sum=0,x[10],f[10],a;
    clrscr();

C C++ CODE for Newton's interpolation

Working C C++  Source code program for Newton's interpolation

/***************** Newtons interpolation **************/
#include<iostream.h>
#include<conio.h>
int main()
{
    int n,i,j;
    float x[10],f[10],a,sum=0,mult;
    clrscr();

C C++ CODE: Cubic Spline Interpolation

Working C C++  Source code program for Cubic Spline Interpolation

/********************* Cubic Spline Interpolation **********************/
#include<iostream.h>
#include<conio.h>
#include<math.h>
int main()
{
    char choice='y';
    int n,i,j,k;

C C++ code : horner's synthetic division

Working C C++  Source code program for horner's synthetic division method for finding solution of polynomial equation.

//horner's polynomial soln, synthetic division
#include <iostream.h>
#include <conio.h>
#include <complex.h>
void main()
{
    int it,n;
    complex a[10],b[10],c[10],x;
    clrscr();
    cout<<"Enter the degree of the polynomial:";
    cin>>n;