Downloading ramdisk ...19%格式输出范例代码

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

static int pre_step;
void printf_node_escape(void);
void printf_node_start(char *string)
{
    fprintf(stderr,string);
    pre_step = -1;
}
void printf_node(int step)
{
    printf_node_escape();
    fprintf(stderr,"%d%c",step,'%');
    pre_step = step;
}
#define string_flashing " ###flashing now..."
void printf_node_flashing(void)
{
    fprintf(stderr,string_flashing);
}
void printf_node_end(char *string)
{
    char *p;

    p = (char*)malloc(sizeof(string_flashing));
    memset(p,'\b',strlen(string_flashing));
    p[strlen(string_flashing)] = 0;
    fprintf(stderr,p);
    memset(p,' ' ,strlen(string_flashing));
    fprintf(stderr,p);
    memset(p,'\b',strlen(string_flashing));
    p[strlen(string_flashing)] = 0;
    fprintf(stderr,p);
    free(p);

    printf_node_escape();
    fprintf(stderr,string);
}
void printf_node_escape(void)
{
         if(pre_step >= 100)fprintf(stderr,"\b\b\b\b");
    else if(pre_step >= 10)fprintf(stderr,"\b\b\b");
    else if(pre_step >= 0)fprintf(stderr,"\b\b");
}
#define manner 3
int main(int argc, char *argv[])
{
    int i,j;
    
//方式1:
    #if manner == 1
    for(;;)
    {
        fprintf(stderr,"Downloading ramdisk\r\n");
        for(i = 1;i < 101;i++)
        {
            fprintf(stderr,"%d%c",i,'%');
            fprintf(stderr,"\r");
            for(j = 0;j < 0xffffff;j++);
        }
        fprintf(stderr,"\r\n");
    }
    #endif
printf_node_flashing
//方式2:
    #if manner == 2
    for(;;)
    {
        fprintf(stderr,"Downloading ramdisk ...");
        for(i = 1;i < 101;i++)
        {
                 if(i > 10)fprintf(stderr,"\b\b\b");
            else if(i > 1)fprintf(stderr,"\b\b");
            fprintf(stderr,"%d%c",i,'%');
            for(j = 0;j < 0x1ffffff;j++);
            //sleep(1);
        }
        fprintf(stderr,"\b\b\b\b");
        fprintf(stderr,"Done.\r\n");
    }
    #endif
//方式3:
    #if manner == 3
    for(;;)
    {
        printf_node_start("Downloading ramdisk ...");
        for(i = 0;i < 101;i++)
        {
            printf_node(i);
            for(j = 0;j < 0xffffff;j++);
            //sleep(1);
        }
        printf_node_flashing();
        sleep(3);
        printf_node_end("Done.\r\n");
    }
    #endif
}