程序打印进度条， linux c

#include <stdio.h>
#include <string.h>
#include <unistd.h>

typedef struct _progress
{
    int cur_size;
    int sum_size;
}progress_t;

void progress_bar(progress_t *progress_data)
{
    int percentage = 0;
    int cnt = 0;
    char proc[102];

    memset(proc, '\0', sizeof(proc));

    percentage = (int)(progress_data->cur_size * 100 / progress_data->sum_size);
    printf("percentage = %d %%\n", percentage);

    if (percentage <= 100)
    {
        while (cnt <= percentage)
        {
//最关键的是这一句打印，相当于 再不断的重新刷新 进度条。

           printf("[%-100s] [%d%%]\r", proc, cnt);
 // 直接将pritnf 显示出来。
           fflush(stdout);
            proc[cnt] = '#';
            usleep(100000);
            cnt++;
        }

    }
    printf("\n");
}

int main(int arc, char *argv[])
{
    progress_t progress_test = {0};

    progress_test.cur_size = 65;
    progress_test.sum_size = 100;
    progress_bar(&progress_test);

    return 0;
}