【linux篇】动静态库和自动化构建的“神之一手”：make、Makefile

BIN=mytest
  2 #SRC=$(shell ls *.c)
  3 SRC=$(wildcard ls *.c)#动态的获取所有源文件（wildcard是Makefile自身语法包含的函数）
  4 OBJ=$(SRC:.c=.o)
  5 CC=gcc
  6 RM=rm -f
  7 
  8 $(BIN):$(OBJ)
  9   $(CC) $^ -o $@
 10   @echo "链接 $^ 成 $@"
 11 %.o:%.c
 12   $(CC) -c $<
 13   @echo "编译 $< 成 $@"                                                                                          
 14 
 15 .PHONY:clean
 16 clean:
 17   $(RM) $(OBJ) $(BIN)
 18 
 19 .PHONY:test
 20 test:
 21   @echo $(BIN)
 22   @echo $(SRC)
 23   @echo $(OBJ)

#include<stdio.h>
#include<unistd.h>
int main()
{
  //linux下一切皆文件，往显示器中打印就是往显示器中写入，加\n表示立即写入
  printf("hello world\n"); //没有\n，在linux下会先停两秒在输出                                                                                      
  sleep(2);
  return 0;
}

#include<stdio.h>
   #include<unistd.h>
   int main()
   {
     int cnt=10;
     while(cnt>=0)
     {
       //如果不加"2"，从10-0输出则会呈现：10、90、80、...
       //因为%d的意思是将输出的内容进行格式化，就是将一个整数格式化为一个字符
       //10格式化后为两个字符，|1|0|。除去10之外的都是一个字符，只占一位，所有会出现10、90、80...的情况
       printf("%-2d\r",cnt);  //左对齐                                                                                      
       fflush(stdout);
      cnt--;
      sleep(1);
    }
    // printf("hello world");
    // fflush(stdout);
    //sleep(2);
    return 0;
  }

#include "process.h"
#include <unistd.h>
#include <time.h>
#include <stdlib.h>

//函数指针类型
typedef void (*call_t)(const char*,double,double);

double total = 1024.0;
//double speed = 1.0;
double speed[] = {1.0, 0.5, 0.3, 0.02, 0.1, 0.01};

//回调函数
void download(int total, call_t cb)
{
    srand(time(NULL));
    double current = 0.0;
    while(current <= total)
    {
        cb("下载中", total, current); // 进行回调
        if(current>=total) break;
        // 下载代码
        int random = rand()%6;
        usleep(5000);
        current += speed[random];
        if(current>=total) current = total;
    }
}

void uploadload(int total, call_t cb)
{
    srand(time(NULL));
    double current = 0.0;
    while(current <= total)
    {
        cb("上传中", total, current); // 进行回调
        if(current>=total) break;
        // 下载代码
        int random = rand()%6;
        usleep(5000);
        current += speed[random];
        if(current>=total) current = total;
    }
}

int main()
{
    download(1024.0, FlushProcess);
    printf("download 1024.0MB done\n");
    download(512.0, FlushProcess);
    printf("download 512.0MB done\n");
    download(256.0,FlushProcess);
    printf("download 256.0MB done\n");
    download(128.0,FlushProcess);
    printf("download 128.0MB done\n");
    download(64.0,FlushProcess);
    printf("download 64.0MB done\n");
    uploadload(500.0, FlushProcess);
    return 0;

#include "process.h"
#include <string.h>
#include <unistd.h>

#define SIZE 101
#define STYLE '='

//v2: 根据进度，动态刷新一次进度条
void FlushProcess(const char *tips, double total, double current)
{
    const char *lable = "|/-\\";
    int len = strlen(lable);
    static int index = 0;
    char buffer[SIZE];
    memset(buffer, 0, sizeof(buffer));

    double rate = current*100.0/total;
    int num = (int)rate;

    int i = 0;
    for(; i < num; i++)
        buffer[i] = STYLE;

    printf("%s...[%-100s][%.1lf%%][%c]\r", tips, buffer, rate, lable[index++]);
    fflush(stdout);
    index %= len;

    if(num >= 100)printf("\n");
}

// v1: 展示进度条基本功能
void process()
{
    int rate = 0;
    char buffer[SIZE];
    memset(buffer, 0, sizeof(buffer));
    const char *lable = "|/-\\";
    int len = strlen(lable);

    while(rate <= 100)
    {
        printf("[%-100s][%d%%][%c]\r", buffer, rate, lable[rate%len]);
        fflush(stdout);
        buffer[rate] = STYLE;
        rate++;
        usleep(10000);
    }

    printf("\n");
}