【C语言及程序设计】冒泡排序算法(bubblesort)

问题描述:

https://blog.csdn.net/sxhelijian/article/details/45342659

从文件salary.txt中读入工人的工资(不超过500人),全部增加20%(好事),然后对工资数据进行排序,将排序后的结果保存到文件ordered_salary.txt中。

 

#include "stdafx.h"
#include "stdlib.h"
#define size 500
#pragma warning (disable :4996)


int main()
{
	FILE *fp;
	fp = fopen("D://code//salary.txt", "r");
	if (fp == NULL)
	{
		printf("file not found.");
		exit(0);
	}

	double salary[size];

	int i(0);
	while ( fscanf(fp, "%lf", &salary[i]) ==1)
	{
		i++;
	}

	fclose(fp);

	printf("测试salary[0]:%.2lf\n\n", salary[0]);

	double med;
	for (int x = 0; x < i-1; x++) //bubblesort
	{
		for (int y = 0; y < i-1-x; y++)
		{
			if ( salary[y]>salary[y+1] )
			{
				med = salary[y+1];
				salary[y + 1] = salary[y];
				salary[y] = med;
			}
		}
	}

	fp = fopen("D://code//ordered_salary.txt", "w");
	if (fp == NULL)
	{
		printf("file not found.");
		exit(0);
	}

	for (int j = 0; j < i; j++)
	{
		fprintf(fp, "%.2lf\n", 1.2*salary[j]);
	}

	fclose(fp);
	return 0;

}  

 

 感想:

for (int x = 0; x < i-1; x++)

第一层循环,每循环一次都会将数组中最大数排到最后

 

 

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posted @ 2018-07-17 10:20  Miyazakehime  阅读(619)  评论(0编辑  收藏  举报