Using a pointer to traverse the data items.

[Dizzy]

Lost on this assignment. Any hints would be extremely helpful!

In the following bubble sort algorithm, data is traversed using array. Please modify the code to use a pointer to traverse the data items.

//bubblesort.cpp
#include <iostream>
using namespace std;
void print (const float[], const int);
void sort (float[], const int);
void swap (float&, float&);
int main(){
     float data[] = {55.5, 22.5, 99.9, 66.6, 44.4, 88.8, 33.3, 77.7};
     int n = 8;
     print(data, n);
     sort(data, n);
     print(data, n);
     char c; cin >> c;
     return 0;
}
void print (const float x[], const int n){
     for (int i=0; i<n; i++) cout << ’\t’ << x[i];
     cout << endl;
}
void swap (float &a, float &b) {
     float temp = a;
     a = b;
     b = temp;
}
//Bubble Sort Algorithm
void sort (float x[], const int n) {// sort ascending
     for (int i=0; i<n; i++)
          for (int j=0; j<n-i-1; j++)
               if (x[j] > x[j+1]) swap(x[j],x[j+1]);
}

The output screen should look like:
55.5 22.5 99.9 66.6 44.4 88.8 33.3 77.7
22.5 33.3 44.4 55.5 66.6 77.7 88.8 99.9

[vlad from moscow]

For example function

void print (const float x[], const int n){
     for (int i=0; i<n; i++) cout << ’\t’ << x[i];
     cout << endl;
}

can be changed to

void print (const float x[], const int n){
     for ( const float *p = x; p != x + n; ++p ) cout << ’\t’ << *p;
     cout << endl;
}

EDIT: and it would be much better if instead of statements

     float data[] = {55.5, 22.5, 99.9, 66.6, 44.4, 88.8, 33.3, 77.7};
     int n = 8;

there were

     const int N = 8;
     float data[N] = {55.5, 22.5, 99.9, 66.6, 44.4, 88.8, 33.3, 77.7};

in main.

[Dizzy]

What i've come up with so far. It compiles and outputs the correct info (is the code correct?)

//bubblesort.cpp
#include <iostream>
#include <cstring>
using namespace std;

void print (const float[], const int);
void sort (float[], const int);
void swap (float&, float&);
float *ptr;
int main(){
    float data[] = {55.5, 22.5, 99.9, 66.6, 44.4, 88.8, 33.3, 77.7};
    int n = 8;
    ptr = data; 
    print(data, n);
    sort(data, n);
    print(data, n);
    char c; cin >> c;
    return 0;
}
void print (const float x[], const int n) {
     for (const float *ptr = x; ptr != x+n; ++ptr) cout<< "\t" << *ptr;
     cout << endl;
}
void swap (float &a, float &b) {
     float temp = a;
     a = b;
     b = temp;
}
//Bubble Sort Algorithm
void sort (float x[], const int n) {// sort ascending
for (int i=0; i<n; i++)
for (int j=0; j<n-i-1; j++)
if (x[j] > x[j+1]) swap(x[j],x[j+1]);
}

[LB]

What is the purpose of lines 9 and 13? This variable is never used.