C Homework: Reading and printing lines of strings

[Nemanja Grubor]

I have a problem figuring out how to print n lines of strings (not just words). I managed to do that after every input line.
But, what I want is to print the below the inputs. For example,

n=3
Input: 1. line: A A A
2. line: B B B
3. line: C C C

Output: 1. line: A A A
2. line: B B B
3. line: C C C

What I am getting is

1. line: A A A
A A A
...

Here is my code (I can't use <string.h> library):

#include <stdio.h>
#include <stdlib.h>
#define MAX 100

int length(char *str)//length of one line//
{
    int l;
    for(l=0;str[l];l++);
    return l;
}
void read(char *str)//read one line//
{
    int i=0;
    char c;
    scanf("%s",str);
    printf("%s",str);//this works, but after every input line//
    do
    {
       scanf("%c",&c);
       str[i++]=c;
    }
    while(c != '\n');
    str[i-1]=0;
    printf("%s",str);//this works, but after every input line//

}

char **form(int *pn)//form dynamic allocation//
{
    do
    {
        printf("n=");
        scanf("%d",pn);
    }
    while(*pn<1 || *pn>MAX);
    char **p;
    char *a;
    int i;
    p=(char **)malloc(*pn * sizeof(char *));
    a=(char *)malloc(*pn * sizeof(char));
    for(i=0;i<*pn;i++)
    {
        printf("%d. line: ",i+1);
        read(a+i);
        p[i]=a+i;
        printf("\n");
    }
    return p;
}

int main()
{
    int pn;
    char **p;
    p=form(&pn);
    free(p);
    return 0;
}

Thanks for replies.

[Campbell Ritchie]

So, what is the program supposed to do?
I can see the replacement for strlen, and can see how that works.
What do the scanf calls in lines 15, 19 and 33 mean? Are you supposed to enter something there? Why is there no prompt printed? You don't need to cram your code so close together. Why does your read procedure have void return type? Why not return some sort of char* or char**?

[Nemanja Grubor]

The program should print n lines of strings after they are entered by user. That is not properly in my code because it prints after every input.

I am using read() function because I can't use <string.h> library.
In function form() I have read the value for number of lines (which is defined as a pointer *pn).

Could you show how to write a function for printing?

[fred rosenberger]

my C is EXTREMLY rusty...but you're read method seems to reach in string then print it. you need to read in several strings and save them all in (perhaps) an array.

Then, once you are done getting input, you need to loop through that array and print each one. There's nothing magic there. You already have most of the pieces. You just need to re-arrange them a bit.