linecount

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

int linecount(char * string);
char ** splitlines(char * string);
void replacechar(char * string, char to, char with);

int main(int argc, char ** argv)
{
    char test[] = "Pierwsza linijka.\n Druga linijka.\n Trzecia linijka. \n";
    char ** lines = splitlines(test);
    while(**lines)
        printf("%s\n", *lines++);
    return 0;
}

int linecount(char * string)
{
    int count = 0;
    while(*string)
        count += (*string++ == '\n');
    return count;
}

char ** splitlines(char * string)
{
    int lcount = linecount(string);
    char ** lines = malloc((lcount + 1) * sizeof(char*));
    int loffset = 0;
    char * sptr = string;

    *(lines + loffset) = sptr;
    loffset++;

    while(*sptr)
    {
        if(*sptr == '\n')
        {
            *(lines + loffset) = sptr + 1;
            *sptr = '\0';
            loffset++;
        }
        sptr++;
    }
    *(lines + loffset) = NULL;
    return lines;

}

void replacechar(char * string, char to, char with)
{
    while(*string)
    {
        if(*string == to)
            *string = with;
        string++;
    }
}