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selection_sort.c
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selection_sort.c
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/*****************************************************************************
* Copyright (C) Bhargavi Neti bhargavineti@gmail.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#include<ncurses.h>
#include"project.h"
#include"graphics_funcs.h"
int s_speed;
/*Function to print array with boxes at passed locations in different colors*/
void printarray_forselection(int pos1, int pos2){
int i;
init_pair(1, COLOR_RED, COLOR_BLACK);
init_pair(2, COLOR_GREEN, COLOR_BLACK);
for(i = 0 ; i < 8 ; i++){
if(i == pos1){
attron(COLOR_PAIR(1));
array[pos1].color = COLOR_RED;
printbox(coords[i].x-array[i].length/2, coords[i].y-array[i].length/2, array[i]);
array[pos1].color = COLOR_YELLOW;
attroff(COLOR_PAIR(1));
}
else if(i == pos2){
attron(COLOR_PAIR(2));
array[pos2].color = COLOR_GREEN;
printbox(coords[i].x-array[i].length/2, coords[i].y-array[i].length/2, array[i]);
array[pos2].color = COLOR_YELLOW;
attroff(COLOR_PAIR(2));
}
else
printbox(coords[i].x-array[i].length/2, coords[i].y-array[i].length/2, array[i]);
refresh();
}
napms(2000/s_speed * 2);
}
/*Function to get speed of selection sort*/
void s_Get_Speed(){
int ch;
Print_Animation(s_speed);
keypad(stdscr, TRUE);
noecho();
do {
Print_SORT(SELECTION);
ch = getch();
switch(ch){
case KEY_DOWN :
s_speed--;
if(s_speed < 1) s_speed = 1;
break;
case KEY_UP :
s_speed++;
if(s_speed > 20) s_speed = 20;
break;
}
Print_Animation(s_speed);
}while(ch != '\n');
echo();
}
/*Function to sort the array upto the passed sorting step*/
void s_sort(int l){
int i, small, pos, j;
init();
for(i = 0 ; i < 8 ; i++)
{
if(i == l)
break;
small = array[i].value;
pos = i;
for(j = i+1 ; j < 8 ; j++){
if(array[j].value < small){
small = array[j].value;
pos = j;
}
}
array[pos].value = array[i].value;
array[i].value = small;
}
}
/*Function to sort array using selection sort and display*/
void Selection_Sort(){
Input_Array();
int small, pos, i, j, menuitem = 0;
s_speed = 1;
clear();
Print_SORT(SELECTION);
s_Get_Speed();
init_pair(1, COLOR_CYAN, COLOR_BLACK);
for(i = 0 ; i < 8 ; i++)
{
small = array[i].value;
pos = i;
for(j = i+1 ; j < 8 ; j++){
printarray_forselection(i, j);
if(array[j].value < small){
small = array[j].value;
pos = j;
}
}
printarray_forselection(i, pos);
swapboxes(i, pos, s_speed);
array[pos].value = array[i].value;
array[i].value = small;
attron(COLOR_PAIR(1));
printarray();
attron(COLOR_PAIR(2));
menuitem = Get_Intermediate_Choice();
if(menuitem == 0)
continue;
else if(menuitem == 1)
break;
else if(menuitem == 2){
s_sort(i);
i--;
}
}
s_sort(-1);
printarray();
clear_intmenu();
}