如何在 C 中将字符串拆分为单独的单词，其中空格不是恒定的？

Question

Here is the format of the file that is being read:

type Extensions

application/mathematica nb ma mb
application/mp21 m21 mp21

I am able to read each entry from the file. Now I want to make a key-value pair where the output for the above entries would be like
{nb: application/mathematica}
{ma:application/mathematica}
and so on.

this is my current code to simply read through the entries

 char buf[MAXBUF];
 while (fgets(buf, sizeof buf, ptr) != NULL)
    {
        if(buf[0] == '#' || buf[0] == '\n')
            continue;  // skip the rest of the loop and continue



        printf("%s\n", buf);
}

Answer 1

"How to split the a string into separate words in C, where the space is not constant?"

A simple answer would be using strtok() (string.h library), but keep it mind that this function affects your initial string. So, if you want to use it again, you should use an temporary variable equal to your initial string.

char *p = strtok(char *str, const char *delim)

where, in place of delim you should place : " ".

Basically, strtok splits your string according to given delimiters.

Here, i let u an example of strtok:

char* p = strtok(str," ");
while(p != NULL){
   printf("%s\n",p);
   p=strtok(NULL," ");
}