c-char

Small examples to understand how char type works in C

/**
*
* @author		@jeffotoni
* @copyright	Copyright (c) 2017
* 
* Different ways to declare a string using char
*
*/

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


/**
*
* Defining typedef of type char as vector
*
*/
typedef char string[];

/**
*
* Defining typedef of char type as vector pointer
*
*/
typedef char *string2[];

/**
*
* Defining typedef of type char as pointer
*
*/
typedef char *string3;


/**
*
* Main function
*
*/
int main(){
	
	/**
	*
	* Defining a pointer with char and assigning a value
	*
	*/
	char *stringx = "Avocado is delicious.";

	/**
	*
	* Defining a char pointer statically
	*
	*/
	char *fstring[0];

	/**
	*
	* Knowing the size of the char
	*
	*/
	int size = strlen(stringx) + 1;

	/**
	*
	* Our first example using pointer char
	*
	*/
	fstring[0] = (char*) malloc(size * sizeof(char));

	/**
	*
	* Copying content stringx to fstring
	*
	*/
	strcpy(fstring[0], stringx);
	
	/**
	*
	* Showing the result
	*
	*/
	printf("\nfstring: %s\n", fstring[0]);

	
	/**
	*
	* Second example
	*
	*/
	char stringy[strlen(stringx)];


	/**
	*
	* Copying content stringx to fstring
	*
	*/
	strcpy(stringy, stringx);

	/**
	*
	* Showing the result stringy
	*
	*/
	printf("\nstringy: %s\n", stringy);


	/**
	*
	* Declaring a vector
	*
	*/
	char *fstringx[] = {};

	/**
	*
	* Allocating memory for the vect
	*
	*/
	fstringx[0] = (char*) malloc(size * sizeof(char));

	/**
	*
	* Copying content stringx to fstring
	*
	*/
	strcpy(fstringx[0], stringx);

	/**
	*
	* Showing the result stringy
	*
	*/
	printf("\nfstringx: %s\n", fstringx[0]);

	
	/**
	*
	* Declaring a vector pointer to pointer
	*
	*/
	// char **fstringy[] = {};


	/**
	*
	* Declaring a string
	*
	*/
	string String = "jefferson name complete";

	/**
	*
	* Declaring a string {}
	*
	*/
	string2 String2 = {"jefferson something", "something there"};


	/**
	*
	* Declaring a array
	*
	*/
	char **array = (char**) malloc((10+1)*sizeof(char*));

	/**
	*
	* Assigning values in our array
	*
	*/
	array[0] = "fluffy";
	array[1] = "small";
	array[2] = "bunny";
	array[3] = 0;

	/**
	*
	* Declaring a y int
	*
	*/
	int y[2][3] = { {10,20,30}, {100,200,300} };

	/**
	*
	* Declaring a x char
	*
	*/
	char x[2][3] = {"jef","ola"};

	
	/**
	*
	* Declaring pointer c
	*
	*/
	char* c[] = {"jef","ola","sel"};


	/**
	*
	* Declaring vect work
	*
	*/
	char work[] = {"I work here"};

	/**
	*
	* Declaring vect work2
	*
	*/
	char work2[] = {'A','B','C'};

	
	/**
	*
	* Declaring pointer vect strings
	*
	*/	
	char* strings[3];

	strings[0] = "foo";
	strings[1] = "bar";
	strings[2] = "baz";
	strings[3] = "jef";
	strings[4] = "je2";
	

	/**
	*
	* Declaring a1
	*
	*/	
	char a1[][14] = { "Hello", "folks" };
	
	/**
	*
	* Declaring a2
	*
	*/
	char* a2[] = { "Hello", "guys" };

	/**
	*
	* Declaring a3
	*
	*/
	char (*a3[])[] = { &"Guys", &"People" };
	

	printf("\n[%s]  [%s]\n",a1[0], a1[1]);
	printf("\n[%s] [%s]\n",a2[0], a2[1]);
	printf("\n[%s] [%s]\n", *a3[0], *a3[1]);
		
}

Compiling

$ gcc char.c -o char