C语言进度条

爱被打了一巴掌 2023-07-17 15:31 36阅读 0赞

###                                                               C语言 进度条 ###

**一、简述**

记--简单的控制台下载进度条。

**二、效果**

Windows：        ![20200322182437632.gif][]

Linux：

![20200322182451119.gif][]

**三、源文件**

processBar.c文件

#include <stdio.h>
    #include <stdlib.h> //rand(), srand()
    #include <time.h>
    
    #define ONEMB	(1024*1024)
    #define ONEGB	(1024*ONEMB) 
    
    //将bute转化为人类容易区分的单位
    int convByteToHumanResult(unsigned int bytes, char* result)
    {
    	int i;
    	char uint[][5] = {"B", "Kb", "MB", "GB", "TB", "PB"};
    	double dbBytes = bytes;
    	
    	if(NULL == result)
    	{
    		return -1;
    	}
    		
    	for(i=0; dbBytes>=1024.0;i++)
    	{
    		dbBytes /= 1024.0;
    	}
    
    	sprintf(result, "%.2lf%s", dbBytes, uint[i]);
    	return i;
    }
    
    //显示进度条
    void showProcessBar(unsigned int total, unsigned int recv, char* info)
    {
    	int i;
    	float frecv = recv;
    	int percent = (int)((frecv/total) * 100);
    	char res1[64] = {0};
    	char sum1[64] = {0};
    	char bar[101] = {0};
    	
    	for(i=0; i<percent; i++)
    	{
    		bar[i] = '#';
    	}
    	
    	convByteToHumanResult(recv, res1);
    	convByteToHumanResult(total, sum1);
    	
    	if(NULL != info)
    	{
    		printf("\r%s total:%s(%u Byte) recv:%s(%u Byte) [%d%%%s]     ", info, sum1, total, res1, recv, percent, bar);
    		fflush(stdout);
    	}	
    }
    
    int main(void)
    {
    	unsigned int i;
    	unsigned int total1 = (unsigned int)188 * ONEMB;
    	unsigned int total2 = (unsigned int)1 * ONEGB + 267 * ONEMB;
    	
    	srand(time(0));//设置随机数种子
    	
    	printf("Start download aaa.log...\n");
    	for(i=0;;)
    	{
    		showProcessBar(total1, i, "download...");
    		
    		if(i >= total1)
    		{
    			break;
    		}
    		
    		i += rand()%1024;
    		
    		if(i>total1)
    		{
    			i = total1;
    		}
    	}
    	
    	printf("\nDownload aaa.log finish!\n\n");
    	
    	printf("Start download CProgram.zip...\n");
    	for(i=0;;)
    	{
    		showProcessBar(total2, i, "download...");
    		
    		if(i >= total2)
    		{
    			break;
    		}
    		
    		i += rand()%8192;
    		
    		if(i>total2)
    		{
    			i = total2;
    		}
    	}
    	
    	printf("\nDownload CProgram.zip finish!\n");
    	
    	return 0;
    }

**四、总结**

4.1 回到行首使用 '\\r'    printf("\\r");

4.2 擦除一个字符使用退格符'\\b',然后用空格覆盖 printf("\\b \\b");

注：不能擦除换行符，即只能擦除同一行的字符。

[20200322182437632.gif]: /images/20230528/59d046bdc8184c048b84e4e39bbfeea9.png
[20200322182451119.gif]: /images/20230528/a5d0dc1dab894aadad20313cff3ef20c.png