C++ :: Selection Process Using Roulette Wheel Selection?

I'm trying to make a selection process using roulette wheel selection. To do this I created two matrix, one random probabilities and one increasing probabilities. The idea is to choose a number according to the random probabilities. Here is the code I've written.

#include <iostream>
#include <conio.h>
#include <cstdlib>
using namespace std;
int main (){
float select [5], prob [10], mat [5];
int c, r, z;
cout.precision (2);
cout << "Random Number:" << endl;

[Code]...

The result I got is as follows:

Random Number:

0.0013 0.56 0.19 0.81 0.59

Increasing Probabilities:

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Selected Column:
0
5
6
8
9

The evaluation doesnt seem to start from c=0 again. The selected column should be 0, 5, 1, 8, 5.