【make/Makefile】Linux下进度条的设计与实现

processbar:test.o processbar.o
  gcc -o $@ $^
test.o:test.c
  gcc -c test.c
processbar.o:processbar.c
  gcc -c processbar.c

.PHONY:clean
clean:
  rm -f processbar test.o processbar.o            

  1 #include <stdio.h>
  2 #include <string.h>
  3 #include <unistd.h>
  4 #include <stdlib.h>
  5 #include <time.h>
  6 
  7 
  8 #define MAX 103
  9 
 10 #define Head '>'
 11 #define Body '='
 12 
 13 void process_fflush(double rate);  

  1 #include "processbar.h"
  2 
  3                                                                   
  4 char* spit = "-\\|/";
  5                      
  6 char buff[MAX] = {0};           
  7 void process_fflush(double rate)
  8 {                                  
  9     static int cnt = 0;  
 10     int n = strlen(spit);                                     
 11     if (rate < 0.5) buff[0] = Head;
 12                                                               
 13     printf("[%-100s][%.1f%%][%c]\r", buff, rate, spit[cnt%n]);
 14     fflush(stdout);        
 15     buff[(int)rate] = Body;                        
 16     if ((int)rate < 99) buff[(int)rate + 1] = Head;
 17                                     
 18     cnt++;
 19                                     
 20     if (rate >= 100.0) printf("\n");
 21 }

  1 #include "processbar.h"
  2 
  3 #define FILE_SIZE 1024*1024*1024
  4 
  5 void download()
  6 {
  7     int total = FILE_SIZE;
  8     srand(time(NULL)^1023);
  9     while (total)
 10     {
 11         usleep(20000);
 12         int one = rand()%(2 * 1024 * 1024);
 13         total -= one;
 14         if (total < 0)
 15             total = 0;
 16         
 17         int download = FILE_SIZE - total;
 18         double rate = (download * 1.0 / (FILE_SIZE)) *100;
 19         process_fflush(rate);
 20     }
 21 }
 22 
 23 int main()
 24 {
 25     download();
 26     return 0;
 27 }