Thread: no error of compilation but my code makes codeblocks bug

Originally Posted by funnydarkvador

Codeblocks stops to work when i run this code, can someone tell me why?

My guess is it is because you keep trying to return memory that you do NOT own.

This is one of the times you did it.

Code:

return largeArray[6][6];

Another time.

Code:

return finalArray[9][9];

Code:

float finalArray[9][9] = {0};

The above code declares an 9 by 9 array; this mean the last float is finalArray[8][8].
The element finalArray[9][9] is NOT part of the array and when you use it; the computer could react in any way;
This includes deleting all your software or crashing.

Tim S.

Previous threads where you've been told that what you're doing is NOT THE RIGHT WAY TO RETURN AN ARRAY!!!!
http://cboard.cprogramming.com/cplus...parameter.html
number of columns and lines in my array
error : variable-sized object 'largeArray2' may not be initialized
http://cboard.cprogramming.com/cplus...ore-float.html

Your indentation needs work (still!).

Here, consider the following.

Code:

#include <iostream>
#include <iomanip>
#include <cstdlib>
using namespace std;

void initArray(float largeArray[6][6])
{
  for (int x = 0; x < 6; x++) {
    for (int y = 0; y < 6; y++) {
      largeArray[x][y] = 0;
    }
  }
}

void printOutArray(float largeArray[6][6])
{
  for (int x = 0; x < 6; x++) {
    for (int y = 0; y < 6; y++) {
      cout << largeArray[x][y] << '\t';
    }
    cout << endl;
  }
//!! DONT DO THIS  return largeArray[6][6];
}

void tata(int degree_denominator, float largeArray[6][6])
{
  float array_of_coefficients[6];
  int c = 0;
  int l = 0;
  int x;
  for (x = degree_denominator; x >= 0; x--) {
    if (l == 2) {
      l = 0;
      c++;
    }
    cout << "what is the coefficient linked with degree" << x << "?" << endl;
    cin >> array_of_coefficients[x];
    largeArray[l][c] = array_of_coefficients[x];
    l++;
  }
//!! DONT DO THIS  return largeArray[6][6];
}

void toto(float largeArray[6][6], float finalArray[9][9] )
{
//!! is now a parameter  float finalArray[9][9] = { 0 };
  int u = 0;
  int v = 0;
  int line = 0;
  int i = 0;
  int r = line - 2;
  int s = line - 1;
  int f = i + 1;

  for (u = 0; u <= 1; u++) {
    for (v = 0; v <= 9; v++) {
      finalArray[u][v] = largeArray[u][v];
    }
  }

  for (line = 2; line < 9; line++) { //!! <, not <=
    for (i = 0; i < 9; i++) {        //!! <, not <=
      finalArray[line][i] =
          ((finalArray[r][f]) - ((finalArray[s][f]) * ((finalArray[r][i]) / (finalArray[s][i]))));
    }
  }
//!! DONT DO THIS  return finalArray[9][9];
}


void printOutArray2(float finalArray[9][9])
{
  for (int x = 0; x <= 9; x++) {
    for (int y = 0; y <= 9; y++) {
      cout << finalArray[x][y] << '\t';
    }
    cout << endl;
  }
//!! DONT DO THIS  return finalArray[9][9];
}

int main()
{
  float finalArray[9][9];
  float largeArray[6][6];
  initArray(largeArray);
  printOutArray(largeArray);
  int degree_denominator;
  cout << "what is the degree of the denominator?" << endl;
  cin >> degree_denominator;
  tata(degree_denominator, largeArray);
  printOutArray(largeArray);
  toto(largeArray,finalArray);  //!! extra parameter for the result
  cout << "final array:" << endl;
  printOutArray2(finalArray);
  system("PAUSE");
}