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

void normalize_path(char *buf)
{
    char *ptr = buf;
    int first = 1, flag = 0;


    while (*ptr)
    {
        if (*ptr == '/')
        {
            flag = 1;

            while (*ptr)
            {
                if (*ptr != '/')
                {
                    break;
                }
                ptr++;
            }
        }

        if (flag)
        {
            *buf = *ptr;
            buf++;
        }
        else
        {
            buf++;
        }

        ptr++;

        // "a///b///c/d"
    }

    buf++;
    *buf = '\0';
}

int main()
{
    char a[] = "a////b///c/d";

    normalize_path(a);

    printf("%s\n", a);

    return 0;
}