A-C/ex8_1.c

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#define MAX 100
typedef int DataType;
typedef struct list{
	DataType data[MAX];
	int start;
	int length;
}List;
/*
	直接插入排序
*/
void DirectSort(List *L){
	int j;
	for(int i = 2; i <= L->length; i++){
		L->data[0] = L->data[i];
		j = i-1;
		while(L->data[0] < L->data[j]){
			L->data[j+1] = L->data[j];
			j = j-1;
		}
		L->data[j+1] = L->data[0];
	}
}
/*
	快速排序
*/
void QuickSort(List *L, int first, int end){
	int i = first, j = end, temp = L->data[i];
	while(i < j){
		while(i < j && temp <= L->data[j]){
			j--;
		}
		L->data[i] = L->data[j];
		while(i < j && L->data[i] <= temp){
			i++;
		}
		L->data[j] = L->data[i];
	}
	L->data[i] = temp;
	if(first < i-1){
		QuickSort(L, first, i-1);
	}
	if(i+1 < end){
		QuickSort(L, i+1, end);
	}
}
/*
	输入数组元素
*/
void input(List *L){
	printf("请输入线性表长度：");
	scanf("%d", &L->length);
	for(int i=L->start; i<L->start + L->length; i++){
		printf("请输入第 %d 个元素：", i + 1 - L->start);
		scanf("%d", &L->data[i]);
	}
}
/*
	输出数组元素
*/
void output(List L){
	printf("数组元素为：\n");
	for(int i=L.start; i<L.start + L.length; i++){
		printf("%d\t", L.data[i]);
	}
	printf("\n\n");
}
int main(){
	List L;
	L.length = 0;
	int choice;
	
	for(;;){
		printf("\t\t1.直接插入排序\n");
		printf("\t\t2.快速排序\n");
		printf("\t\t0.退出\n");
		
		printf("请选择：");
		scanf("%d", &choice);
		if(choice == 0) break;
		switch (choice) {
		case 1:
			L.start = 1;
			input(&L);
			output(L);
			DirectSort(&L);
			output(L);
			break;
		case 2:
			L.start = 0;
			input(&L);
			output(L);
			QuickSort(&L, L.start, L.start + L.length - 1);
			output(L);
			break;
		default:
			break;
		}
		printf("请按任意键继续...");
		getch();
		system("cls");
	}
	printf("感谢使用，再见\n");
	return 0;
}