CODEWITHSUNDEEP
cstdinfgetsstrtok
Gideon Mooijen
Gideon Mooijen

Reputation: 53

Using fgets in combination with strtok to transform input to tokens

I am reading input from different text files. These text files are integers that are either separated by a space, a new line, or a combination of spaces and new lines. I want to convert these strings to integers, and use these integers for a sorting algorithm.

char *line = malloc(BUF_SIZE);
char *token;

struct list* l = list_init();

while (fgets(buf, BUF_SIZE, stdin)) {
    token = strtok(buf," \n");
    printf("%s", token);
}

list_cleanup(l);

return 0;

What is wrong with this, it that it just prints the first element of each line. It doesn't handle multiple elements per line.

Thanks in advance.

Upvotes: 3

Views: 833

Answers (1)

kiran Biradar
kiran Biradar

Reputation: 12742

You need to have loop to process all the tokens. strtok will return NULL once all the tokens are over.

Example:

while (fgets(buf, BUF_SIZE, stdin)) {
    token = strtok(buf," \n");

    while (token != NULL) { 
        printf("%s", token);
        token = strtok(NULL," \n");
    }
}

Upvotes: 6

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