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sort.c
357 lines (316 loc) · 7.52 KB
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sort.c
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/*
* =====================================================================================
*
* Filename: sort.c
*
* Description: test sorting algorithm
*
* Version: 1.0
* Created: 03/24/2016 05:11:30 PM
* Revision: none
* Compiler: gcc
*
* Author: rex ,
* Company: CIG
*
* =====================================================================================
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <time.h>
#define LEN 15
static int unsorted[LEN] = {3,44,38,5,47,15,36,26,27,2,46,4,19,50,48};
void print_element(int *dest, int len) {
int i = 0;
for(i = 0; i < len; i++) {
printf("%d,", dest[i]);
}
printf("\n");
}
void restore_element(int *dest, int len) {
memset(dest, 0, sizeof(unsorted));
memcpy(dest, unsorted, sizeof(unsorted));
}
void bubble_sort(int *dest, int len) {
bool swapped = false;
int i = 0;
int temp = 0;
do {
swapped = false;
for(i = 0; i < len-1; i++) {
if(dest[i] > dest[i+1]) {
temp = dest[i+1];
dest[i+1] = dest[i];
dest[i] = temp;
swapped = true;
}
}
len--;
}while(swapped && len > 1);
}
void select_sort(int *dest, int len) {
int i = 0;
int j = 0;
int mindex = 0;
int temp = 0;
for(i = 0; i < len -1; i++) {
mindex = i;
for(j = i+1; j < len; j++) {
if(dest[j] < dest[mindex]) {
mindex = j;
}
}
if(i != mindex) {
temp = dest[mindex];
dest[mindex] = dest[i];
dest[i] = temp;
}
}
}
void insert_sort(int *dest, int len) {
int i = 0;
int j = 0;
int insertVal = 0;
for(i = 1; i < len; i++) {
insertVal = dest[i];
for(j = i-1; j >= 0; j--) {
if(insertVal < dest[j]) {
dest[j+1] = dest[j];
if(j == 0) {
dest[j] = insertVal;
}
}else {
dest[j+1] = insertVal;
break;
}
}
}
}
void merge(int *dest, int left, int right) {
int *temp;
int i = 0;
int j = 0;
int k = 0;
temp = (int *)malloc(sizeof(int)*(left+right));
for(k = 0; i < left && j < right; k++) {
if(dest[i] < dest[left+j]) {
temp[k] = dest[i];
i++;
}else {
temp[k] = dest[left+j];
j++;
}
}
if(i == left) {
while(j < right) {
temp[k] = dest[left+j];
j++;
k++;
}
}
if(j == right) {
while(i < left) {
temp[k] = dest[i];
i++;
k++;
}
}
memcpy(dest, temp, sizeof(int)*(left+right));
free(temp);
}
void merge_sort(int *dest, int len) {
if(len == 1) {
return;
}
merge_sort(dest, len/2);
merge_sort(dest+len/2, len-len/2);
merge(dest, len/2, len-len/2);
}
int partition(int *dest, int len) {
int pivot = dest[0];
int temp = 0;
int storeIdx = 1;
int i = 0;
for(i = 1; i < len; i++) {
if(dest[i] < pivot) {
temp = dest[i];
dest[i] = dest[storeIdx];
dest[storeIdx] = temp;
storeIdx++;
}
}
temp = pivot;
dest[0] = dest[storeIdx -1];
dest[storeIdx - 1] = temp;
return storeIdx - 1;
}
void quick_sort(int *dest, int len) {
int index = 0;
if(len <= 1) {
return;
}
index = partition(dest, len);
quick_sort(dest, index);
quick_sort(dest+index+1, len-index-1);
}
int rpartition(int *dest, int len) {
int pivot = 0;
int temp = 0;
int storeIdx = 1;
int i = 0;
int randomIdx = 0;
srand((unsigned int)time(NULL));
randomIdx = rand()%len;
temp = dest[0];
dest[0] = dest[randomIdx];
dest[randomIdx] = temp;
pivot = dest[0];
for(i = 1; i < len; i++) {
if(dest[i] < pivot) {
temp = dest[i];
dest[i] = dest[storeIdx];
dest[storeIdx] = temp;
storeIdx++;
}
}
temp = pivot;
dest[0] = dest[storeIdx -1];
dest[storeIdx - 1] = temp;
return storeIdx - 1;
}
void rquick_sort(int *dest, int len) {
int index = 0;
if(len <= 1) {
return;
}
index = rpartition(dest, len);
rquick_sort(dest, index);
rquick_sort(dest+index+1, len-index-1);
}
void count_sort(int *dest, int len) {
int i = 0;
int j = 0;
int k = 0;
int max = dest[0];
int *temp;
for(i = 1; i < len; i++) {
if(dest[i] > max) {
max = dest[i];
}
}
temp = (int *)malloc((max+1) * sizeof(int));
memset(temp, 0, (max+1)*sizeof(int));
for(i = 0; i < len; i++) {
temp[dest[i]]++;
}
for(i = 0; i < max+1; i++) {
if(temp[i] != 0) {
for(k = 0; k < temp[i]; k++) {
dest[j] = i;
j++;
}
}
}
free(temp);
}
void radix_sort(int *dest, int len) {
int *temp;
int *count;
int tmp = 0;
int i = 0;
int j = 0;
int max = 0;
int t = 0;
int radix = 1;
int var = 0;
temp = (int *)malloc(len*sizeof(int));
count = (int *)malloc(10*sizeof(int));
for(i = 0; i < len; i++) {
tmp = dest[i];
t = 1;
while(tmp > 10) {
tmp /= 10;
t++;
}
if(t > max) {
max = t;
}
}
for(i = 1; i <= max; i++) {
memset(temp, 0, len*sizeof(int));
memset(count, 0, 10*sizeof(int));
for(j = 0; j < len; j++) {
var = (dest[j]/radix)%10;
count[var]++;
}
for(j = 1; j < 10; j++) {
count[j] = count[j-1] + count[j];
}
for(j = len-1; j >= 0; j--) {
var = (dest[j]/radix)%10;
temp[count[var] -1] = dest[j];
count[var]--;
}
for(j = 0; j < len; j++) {
dest[j] = temp[j];
}
radix = radix*10;
}
free(temp);
free(count);
}
void main(void) {
int *dest;
dest = (int *)malloc(sizeof(unsorted));
//bubble
restore_element(dest, LEN);
print_element(dest, LEN);
bubble_sort(dest, LEN);
printf("bubble sorted done!\n");
print_element(dest, LEN);
//select
restore_element(dest, LEN);
print_element(dest, LEN);
select_sort(dest, LEN);
printf("select sorted done!\n");
print_element(dest, LEN);
//insert
restore_element(dest, LEN);
print_element(dest, LEN);
insert_sort(dest, LEN);
printf("insert sorted done!\n");
print_element(dest, LEN);
//merge
restore_element(dest, LEN);
print_element(dest, LEN);
merge_sort(dest, LEN);
printf("merge sorted done!\n");
print_element(dest, LEN);
//quick
restore_element(dest, LEN);
print_element(dest, LEN);
quick_sort(dest, LEN);
printf("quick sorted done!\n");
print_element(dest, LEN);
//rquick
restore_element(dest, LEN);
print_element(dest, LEN);
rquick_sort(dest, LEN);
printf("r-quick sorted done!\n");
print_element(dest, LEN);
//count
restore_element(dest, LEN);
print_element(dest, LEN);
count_sort(dest, LEN);
printf("count sorted done!\n");
print_element(dest, LEN);
//radix
restore_element(dest, LEN);
print_element(dest, LEN);
radix_sort(dest, LEN);
printf("radix sorted done!\n");
print_element(dest, LEN);
free(dest);
}