Using codeblocks code in visual studio - c++

Question

I am used to write C++ project in CodeBlocks, but for some stupid reasons I have to show it to my teacher in VisualStudio. I tried to make a console app or an empty project, and copied my main file there, but with the first one I get bunch of erorrs and the second one I get 'The system cannot find the way specified'. What is different in VisualStudio? I don't understand at all what is wrong.
here is my code
#include <iostream>
#include <fstream>
#include <math.h>
using namespace std;
const int kroku = 1000;
const double aa = 0; //pocatecni bod intervalu
const double bb = 1; //konečný bod intervalu
double a; //parametr
const double h = (bb - aa) / kroku; //krok
double p(double t) { //(py')' - qy = f
return exp(a*pow(t, 2));
}
double q(double t) {
return -exp(a*pow(t, 2))*pow(a, 2)*pow(t, 2);
}
double dp(double t) {
return 2 * t*a*exp(a*pow(t, 2));
}
double y[kroku + 1]; //řešení původní rce
double dydx[kroku + 1];
double z[kroku + 1]; //řešení dílčí rce
double dzdx[kroku + 1];
double x[kroku + 1]; //rozdělení intervalu (aa, bb) po krocích h
void generateX() { //generuje hodnoty x
for (int k = 0; k <= kroku; k++) {
x[k] = aa + k*h;
}
}
double partial(double pp1, double pp2, double w[kroku + 1], double dwdx[kroku + 1], double v)//řešení rce (pw')' - qw = g s pp
{
w[v] = pp1; //inicializace - počáteční podmínka
dwdx[v] = pp2; //inicialzace - počáteční podmínka
for (int i = 0; i <= kroku; i++) { //substituce dwdx proměnná -> dwdx = (w_(n+1) - w_n)/h) && dwdx =
w[i + 1] = h*dwdx[i] + w[i];
dwdx[i + 1] = (h / p(aa + h*i))*(q(aa + h*i)*w[i] - dp(aa + h*i)*dwdx[i]) + dwdx[i];
}
return 0;
}
double omega1, omega2; //nové počáteční podmínky omega1 = y(x0), omega2 = y'(x0)
void print(double N[kroku + 1])
{
fstream file;
file.open("data.dat", ios::out | ios::in | ios::trunc);//otevření/vytvoření(trunc) souboru
if (file.is_open()) //zápis do souboru
{
cout << "Writing";
file << "#" << "X" << " " << "Y" << endl;
for (int j = 0; j <= kroku; j++) {
file << x[j] << " " << N[j] << endl;
}
file << "#end";
}
else
{
cout << "Somethinq went wrong!";
}
file.close();
}
int main()
{
double alpha; //pocatecni podminka y(aa) = alpha
double beta; //y(bb) = beta
cout << "Assign the value of beta " << endl;
cin >> beta;
cout << "Assign the value of alpha " << endl;
cin >> alpha;
cout << "Assign the value of parameter a" << endl;
cin >> a;
double alpha1 = 0; //alpha1*p(aa)*y'(aa) - beta1*y(aa) = gamma1
//double alpha2 = 0; //alpha2*p(bb)*y'(bb) + beta2*y(bb) = gamma2
double beta1 = -1;
double beta2 = 1;
double gamma1 = alpha;
double gamma2 = beta;
generateX();
partial(alpha1, beta1 / p(aa), z, dzdx, aa); //(pz')'-qz = 0
omega1 = gamma2 / beta2;
omega2 = 1 / (z[kroku] * p(bb))*(gamma1 + dzdx[kroku] * p(bb));
partial(omega1, omega2, y, dydx, aa);//(py')' - qy = f = 0
print(y);
return 0;
strong text}
when I add
#include "stdafx.h"
I get four errors
2x 'Expression must have integral or unscoped enum type'
2x 'subscript is not of integral type'
for these lines
w[v] = pp1;
dwdx[v] = pp2;
Could anyone please help me? Thank you a lot

Answer 1

array subscript v in your line
w[v]
can not be double. It must be of interger type.