Question

can someone explain what the functions do in this program

Answer 1

#include <iostream>
#include<cmath>
using namespace std;
//global constants
const int MAX_PAIRS=10;


//data types
struct point
{
double x, y, distance;
};
enum pointType {valuex, valuey, valued};

//functions
void readData(point[]);
void sortData(point[],pointType);
void printData(point[]);

int main()
{
pointType i;
point pointList[MAX_PAIRS];
readData(pointList);
for(i=valuex;i<=valued;i=pointType(i+1))
{
sortData(pointList,i);
if(i==valuex)
cout<<"this is soorted by x in ascending order"<<endl;
else if(i==valuey)
cout<<"this is sorted by y in descending order"<<endl;
else
cout<<"this is the distance by ascending order"<<endl;
printData(pointList);
}
return 0;
}


void readData(point pointList[MAX_PAIRS])
{
int i;
for (i=0;i<=MAX_PAIRS-1;i++)
{
cout <<"please enter the x and y for the pairs "<<i+1<<endl;
cin>>pointList[i].x>>pointList[i].y;
pointList[i].distance=sqrt(pow(pointList[i].x,2)+pow(pointList[i].y,2));
}
}

void sortData(point pointList[MAX_PAIRS],pointType whichValue)
{
int i,last;
point temp;
bool outOfOrder;
for(last=MAX_PAIRS-1;last>=0;last--)
for(i=0;i<=last-1;i++)
{
switch(whichValue)//which field am I sorting by?
{
case valuex:
outOfOrder=pointList[i].x>pointList[i+1].x;
break;
case valuey:
outOfOrder=pointList[i].y<pointList[i+1].y;
break;
case valued:
outOfOrder=pointList[i].distance>pointList[i+1].distance;
break;
}
if(outOfOrder)
{
temp=pointList[i];
pointList[i]=pointList[i+1];
pointList[i+1]=temp;
}
}
}


void printData(point pointList[MAX_PAIRS])
{
int i;

for (i=0;i<=MAX_PAIRS-1;i++)
{
cout<<pointList[i].x<<", "<<pointList[i].y
<<", "<<pointList[i].distance<<endl;
}
cout<<endl;
}

Answer 2

which function.....

Answer 3

there are more than one functions in this program. Please specify any particular function whose operation you want to know.

Answer 4

@rohitranjan1994
@ADGENIUS
I wanted to know what all three functions did