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排序算法,冒泡排序,选择排序,插入排序
chunli@CentOS/tmp/work$ cat sort.c #include <stdio.h> #include <stdlib.h> #include <time.h> int bubble_sort(int array[], int size) { if(NULL == array || size <2) { return -1; } int i = 0; int j = 0; for(i = 0; i < size; i++) { for(j = 0; j < size; j++) { if(array[i] < array[j]) { int t = array[i]; array[i] = array[j]; array[j] = t; } } } return 0; } int select_sort(int array[], int size) { if(NULL == array || size <2) { return -1; } int i = 0; int j = 0; int index = 0; for(i=0; i<size-1; i++) { index = i; for(j=i+1;j<size;j++) { if(array[j] < array[index]) { index = j; } } int tmp = array[i]; array[i] = array[index]; array[index] = tmp; } return 0; } int insert_sort(int array[], int size) { if(NULL == array || size <2) { return -1; } int i = 0; int j = 0; int t = 0; for(i=1; i<size; i++) { if(array[i-1] > array[i]) { t = array[i]; j = i; while(j>0 && array[j-1]>t) { array[j] = array[j-1]; j--; } array[j] = t; } } return 0; } int main() { srand((int)time(NULL)); int array[30]; for(int i=0;i<sizeof(array)/sizeof(int);i++) array[i] = rand()%100; for(int i=0;i<sizeof(array)/sizeof(int);i++) printf("%02d ", array[i]); printf("\n"); bubble_sort(array,sizeof(array)/sizeof(int)); //select_sort(array,sizeof(array)/sizeof(int)); //insert_sort(array,sizeof(array)/sizeof(int)); for(int i=0;i<sizeof(array)/sizeof(int);i++) printf("%02d ", array[i]); printf("\n"); return 0; } chunli@CentOS/tmp/work$ gcc sort.c -Wall -std=c99 && ./a.out 35 05 33 14 81 51 22 18 09 17 57 83 10 03 04 82 92 84 72 28 48 01 74 06 81 94 44 62 56 08 01 03 04 05 06 08 09 10 14 17 18 22 28 33 35 44 48 51 56 57 62 72 74 81 81 82 83 84 92 94 chunli@CentOS/tmp/work$
二分查找:
chunli@CentOS/tmp/work$ cat sort.c #include <stdio.h> #include <stdlib.h> #include <time.h> int bubble_sort(int array[], int size) { if(NULL == array || size <2) { return -1; } int i = 0; int j = 0; for(i = 0; i < size; i++) { for(j = 0; j < size; j++) { if(array[i] < array[j]) { int t = array[i]; array[i] = array[j]; array[j] = t; } } } return 0; } int binaray(int array[], int size, int key) { int low = 0; int high = size; int mid = 0; while(low <= high) { mid = (high+low)/2; if(key == array[mid]) { return mid; } else if(key > array[mid]) { low = mid+1; } else { high = mid-1; } } return -1; } int main() { srand((int)time(NULL)); int array[30]; int ret = 0; for(int i=0;i<sizeof(array)/sizeof(int);i++) array[i] = rand()%100; for(int i=0;i<sizeof(array)/sizeof(int);i++) printf("%02d ", array[i]); printf("\n"); bubble_sort(array,sizeof(array)/sizeof(int)); for(int i=0;i<sizeof(array)/sizeof(int);i++) printf("%02d ", array[i]); printf("\n"); ret = binaray(array, sizeof(array)/sizeof(int), 16); printf("查找值%d\n",ret); return 0; } chunli@CentOS/tmp/work$ gcc sort.c -Wall -std=c99 && ./a.out 39 98 53 33 01 15 53 66 69 83 32 37 05 40 34 65 67 64 77 62 30 38 70 11 54 73 58 85 67 79 01 05 11 15 30 32 33 34 37 38 39 40 53 53 54 58 62 64 65 66 67 67 69 70 73 77 79 83 85 98 查找值-1 chunli@CentOS/tmp/work$
二分查找,递归实现
chunli@CentOS/tmp/work$ cat sort.c #include <stdio.h> #include <stdlib.h> #include <time.h> int bubble_sort(int array[], int size) { if(NULL == array || size <2) { return -1; } int i = 0; int j = 0; for(i = 0; i < size; i++) { for(j = 0; j < size; j++) { if(array[i] < array[j]) { int t = array[i]; array[i] = array[j]; array[j] = t; } } } return 0; } int binaray(int array[], int IndexLow, int IndexHigh, int key) { if(NULL == array) { return -1; } if(IndexLow <= IndexHigh) { int IndexMid = (IndexLow + IndexHigh)/2; if(array[IndexMid] == key) { return IndexMid; } else if(key > array[IndexMid]) { return binaray(array, IndexMid+1, IndexHigh, key); } else { return binaray(array, IndexLow, IndexMid-1, key); } } return -1; } int main() { srand((int)time(NULL)); int array[31]; int ret = 0; for(int i=0;i<sizeof(array)/sizeof(int);i++) array[i] = rand()%100; for(int i=0;i<sizeof(array)/sizeof(int);i++) printf("%02d ", array[i]); printf("\n"); bubble_sort(array,sizeof(array)/sizeof(int)); for(int i=0;i<sizeof(array)/sizeof(int);i++) printf("%02d ", array[i]); printf("\n"); printf("-------\n"); ret = binaray(array, 0, sizeof(array)/sizeof(int)-1, 6); printf("index=%d\n",ret); ret = binaray(array, 0, sizeof(array)/sizeof(int)-1, 99); printf("index=%d\n",ret); return 0; } chunli@CentOS/tmp/work$ gcc -g sort.c -Wall -std=c99 && ./a.out 90 09 13 02 15 37 67 45 18 28 99 68 61 53 70 93 94 41 21 14 64 67 31 25 78 12 33 03 52 84 64 02 03 09 12 13 14 15 18 21 25 28 31 33 37 41 45 52 53 61 64 64 67 67 68 70 78 84 90 93 94 99 ------- index=-1 index=30 chunli@CentOS/tmp/work$
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