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#include <iostream>
#include <cstring>
#include "potus.h"
#define FILENAME "presidents.dat"
#define CHARLEN 27
using namespace std;
void sortName( struct president * [], char * [], int ); // sorts the presidents by last name
void sortYear( struct president * [], int ); // sort the presidents by inauguration year
void sortState( struct president * [], int ); // sorts the president by home state
void swap( struct president ** , struct president ** ); // swaps the two things that are sent to it
int main()
{
struct president * potusList[50]; // array of pointers to structure
int numPotus; // number of potus structures extracted from file
char temp[27]; // temperorary variable
char * ptr; // pointer that points at tokens
char * lastName[numPotus]; // array of pointers that point at last name
int count; // count for loop
//call function to load structures
loadPotus( potusList, FILENAME );
numPotus = loadPotus( potusList, FILENAME );
// call functions to sort array
for( count = 0; count < numPotus; count++ )
{
strcpy( temp, potusList[count] -> name );
ptr = strtok( temp, " ." );
while( ptr )
{
ptr = strtok( NULL, " .\n\t" );
lastName[count] = ptr;
}
}
sortName( potusList, lastName, numPotus );
// pause program
cout << "Press ENTER to continue";
cin.get ( );
cin.ignore ( 1, '\n' );
for( count = 0; count < numPotus; count++ )
{
strcpy( temp, potusList[count] -> term );
ptr = strtok( temp, "- " );
if( ptr )
{
year[count] = ptr;
}
}
sortYear( potusList, year, numPotus );
// pause program
cout << "Press ENTER to continue";
cin.get ( );
cin.ignore ( 1, '\n' );
sortState( potusList, numPotus );
return 0;
}
/* sortName: sorts all the potus by last name and prints them out
* Parameters:
* potusList: array of pointers that point at potus structures
* numPotus: number of elements in array
* Returns: nothing
*/
void sortName( struct president * potus[], char * lastName[], int numPotus )
{
int count; // count for loop
int swapCtr; // counter for sort loop
int min = 0; // first name in list
// loop to sort
for( swapCtr = 0; swapCtr < numPotus; swapCtr ++ )
{
min = swapCtr;
for( count = min + 1; count < numPotus; count ++ )
{
if( lastName[count] < lastName[swapCtr] )
{
swap( & potus[swapCtr], & potus[swapCtr + 1] );
}
}
}
// loop to print sorted array
cout << "Sorted by Last Name:\n";
for( count = 0; count < numPotus; count++ )
{
cout << potus[count] -> name << "\n";
cout << potus[count] -> term << "\n";
cout << potus[count] -> state << "\n";
}
}
/* sortYear: sorts all the potus by inauguration year
* Parameters:
* potusList: array of pointers that point to potus structures
* numPotus: number of elements in array
* Returns: nothing
*/
void sortYear( struct president * potus[], char * year [], int numPotus )
{
int count; // count for loop
int swapCtr; // count for outer loop
int sorter; // count for inner loop
int min = 0; // first name in list
// loop to find last name and sort
for( count = 0; count < numPotus; count++ )
{
min = count;
for( swapCtr = count + 1; swapCtr < numPotus; swapCtr ++ )
{
if( year[swapCtr] < year[count] )
{
swap( & potus[count], & potus[swapCtr] );
}
}
}
// loop to print sorted array
cout << "Sorted by Inauguration Year:\n";
for( count = 0; count < numPotus; count++ )
{
cout << year[count] << "\n";
cout << potus[count] -> name << "\n";
cout << potus[count] -> term << "\n";
cout << potus[count] -> state << "\n";
}
}
/* sortState: sorts all the potus by home state
* Parameters:
* potusList: array of pointers that point to potus structures
* numPotus: number of elements in array
* Returns: nothing
*/
void sortState( struct president * potus[], int numPotus )
{
int count; // count for loop
int swapCtr; // count for swap loop
int min = 0; // first name in list
for( count = 0; count < numPotus; count++ )
{
min = count;
for( swapCtr = count + 1; swapCtr < numPotus; swapCtr ++ )
{
if( * potus[swapCtr] -> state < * potus[min] -> state )
{
swap( & potus[min], & potus[swapCtr] );
}
}
}
// loop to print sorted array
cout << "Sorted by Home State:\n";
for( count = 0; count < numPotus; count++ )
{
cout << potus[count] -> name << "\n";
cout << potus[count] -> term << "\n";
cout << potus[count] -> state << "\n";
}
}
/* swap: swaps the 2 pointers that are sent to the function
* Parameters:
* lesser: pointer that will be replaced
* greater: pointer that will take the place of another
* Returns: nothing
*/
void swap( struct president ** lesser, struct president ** greater )
{
struct president * temp = 0; // temp variable for structure pointer
// swap pointers
temp = * lesser;
* lesser = * greater;
* greater = temp;
}
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