*shrug* Works fine for me. What compiler are you using?
The id's are only getting sorted because you're only exchanging the id numbers and not the actual names of the people. You want to pass exchange() two nodes to exchange, not two id numbers.
Code:
#include "stdafx.h"
#include<iostream.h>
#include<fstream.h>
#include<iomanip.h> //set width to output phone #
#include<stdlib.h>
#define IN ("student.txt")
const int SIZE = 3;
struct node
{
char lastname[20];
char firstname[20];
char phonenum[12];
/*
struct phonenum
{
int areacode;
int num1;
int num2;
*/
double id;
};
void readfile();
void sort(node[], int);
void exchange(node &, node &);
//void search();
void display(node[], int);
int main()
{
readfile();
return 0;
}
void readfile()
{
ifstream fin(IN);
int size = 0;
node info[SIZE]; // 10?
int i =0;
while (!fin.eof())
{
if (i < SIZE)
{
fin >> info[i].lastname;
fin >> info[i].firstname;
fin >> info[i].phonenum;
fin >> info[i].id;
i++;
size++;
}
sort(info, size);
}
display(info, size);
}
void display(node info[], int size)
{
for (int i=0; i < size; i++)
{
cout << info[i].lastname << " " << info[i].firstname << "\t"
<< info[i].phonenum << " " << info[i].id<<"\n";
}
}
void sort (node info[], int size)
{
int top;
bool sorted = 0;
while (!sorted)
{
sorted = 1;
for (top = 0; top < size -1; top++)
{
if (info[top].id > info[top +1].id)
{
exchange(info[top], info[top+1]);
sorted = 0;
}
}
}
}
void exchange (node &x, node &y)
{
node temp = x;
x = y;
y = temp;
}
That WORKS. It will NOT work if there is a new line at the end of your students.txt file. It happened to me when I added another element to test. So, my guess is you have an extra new line at the end of your data file.
