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


int main(int argc, char *argv[])
{
    char *prog = argv[0];
    
    char **linelist;
    int listlen = 3;
    int index = 0;

    char *line;
    int linelen = 80;
    int len = 0; 


    /*allocate memory*/
    /*****************/
    linelist = calloc(sizeof(char **), listlen);
    if (linelist == NULL) {
        fprintf(stderr, "%s: Error. Could not allocate memory\n", \
                prog);
        exit(42);
    }

    line = malloc(linelen);
    if (line == NULL) {
        fprintf(stderr, "%s: Error. Could not allocate memory\n", \
                prog);
    }

    /*fill it manually*/
    /******************/
    linelist[0] = "foo";
    linelist[1] = "bar";
    linelist[2] = "baz";


    /*print result on stdout, dummy*/
    /*******************************/
    for (index = 0; index < 3; ++index) {
        printf("%s\n", linelist[index]); 
    }

    
    return 0; 
}

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

int main(int argc, char *argv[])
{
    char *prog = argv[0]; 
    
    char **linelist;
    int listlen = 3; 
    int index = 0; 

    char *line; 
    int linelen = 80; 
    int len = 0; 

    

    /*allocate memory*/
    /*****************/
    linelist = calloc(sizeof(char **), listlen); 
    if (linelist == NULL) {
        fprintf(stderr, "%s: Error. Could not allocate memory\n", \
                prog); 
        exit(42); 
    }

    line = malloc(linelen); 
    if (line == NULL) {
        fprintf(stderr, "%s: Error. Could not allocate memory\n", \
                prog); 
    }

    /*read input with getline*/
    /*************************/
    /* the former while  fails, lets check if the latter succeeds: well, kinda*/
    /*while (len = getline(&line, &linelen, stdin) && index < linelen -1 )   ) {*/
    while (index < listlen && (len = getline(&line, &linelen, stdin))   ) {
        /* debugging purpose*/    
        printf("size of line is: %d\n", len); 
        
        linelist[index] = malloc(len); 
        if (linelist[index] == NULL) {
            fprintf(stderr, "%s: Error. Could not allocate memory\n", \
                    prog); 
        }

        linelist[index] = line;
        /*debugging purpose*/
        printf("line is: %s\n", linelist[index]); 
        /*gives correct output*/    
        ++index; 
    }

    /*result*/
    /********/
    /* both  gives wrong output,all give the last string entered on stdin*/
    for (index = 0; index < listlen -1; index++) {
        printf("element %d of linelist is: %s\n",  \
            index, linelist[index]); 
        }

    printf("%s\n", linelist[0]); 
    printf("%s\n", linelist[1]); 
    printf("%s\n", linelist[2]); 

    return 0; 
}

    while (index < listlen && (len = getline(&line, &linelen, stdin))   ) {
        /* debugging purpose*/    
        printf("size of line is: %d\n", len); 
        
        linelist[index] = malloc(len); 
        if (linelist[index] == NULL) {
            fprintf(stderr, "%s: Error. Could not allocate memory\n", \
                    prog); 
        }

        linelist[index] = line;
        /*debugging purpose*/
        printf("line is: %s\n", linelist[index]); 
        /*gives correct output*/    
        ++index; 
    }