Question

Please answer the problem below in C programming language:

Create a pointer activity source file - cptr2.c - that takes two arguments, a number from 1 to 3, and a string sentence(s).

1. Create variables for a character, an integer, a string pointer. Based on integer value you will use that number of string pointers.
2. The string variable is a string pointer that has not been allocated.   
3. Define pointers to those variables types without any initialization of those points to the previous variables e.g. pChr, pInt, pSentence.
4. Ensure the argument entered is from 1-3 and the sentence are entered. Errors out if not.
5. Assign: [using argc and argv]
   1. Integer - to number entered from 1-3
   2. Character - to first letter in the sentence.
   3. String pointer(s) - to sentence(s)
6. Assign pointers to the corresponding variables.
7. Call a Function on a separate file - pointPrint.c - passing the initialized pointers. Print out values for the three variables without using the variables themselves as you passed the pointers. Make sure the function also decrements the counter passed by the integer pointer.
8. Repeat as many times as the argument provided.

Output should look something like:

./cptr2 1 help people in need

Character: h

Integer: 1

String: help people in need

OR

./cptr2 2 "what time is it" "how are you doing"

Character: w

Integer: 2

String: what time is it

Character: h

Integer: 1

String: how are you doing

Answer 1

/*cptr.c

CODE BEGINS HERE*/

#include <stdio.h>
#include <stdlib.h>
#include "pointPrint.c"

int main(int argc, char** argv)
{
    if (argc < 2)
    {
        printf("ERROR (Incorrect Argument count)\n");
        return -1;
    }
    int num = argv[1][0] - 48;
    char c = argv[2][0];

    if (num > 3 || num < 1 || argv[1][1]) // Number more than 1 digit or not in limit(1-3)
    {
        printf("ERROR (Incorrect Number Entered)\n");
        return -1;
    }
    else if (argc != num + 2)
    {
        printf("ERROR (Incorrect Argument count)\n");
        return -1;
    }

    char** strings = malloc(num * sizeof(char*));
    for (int i = 0; i < num; ++i)
        strings[i] = argv[i + 2];

    while (num)
    {

        c = strings[argv[1][0] - 48 - num][0];
        func(strings[argv[1][0] - 48 - num], &num, &c);
    }

    return 0;
}

/* END CODE*/

/*pointPrint.c

CODE BEGINS HERE*/

#include <string.h>

int func(char* string, int* num, char* c)
{
   printf("Character: %c\n", *c);
   printf("Integer: %d\n", *num);
   printf("String: %s\n", string);

   (*num)--;
   return *num;
}

/* END CODE*/