Using realloc() to change memory allocation. - C Memory

C examples for Memory:realloc

  1. HOME
  2. C
  3. Memory
  4. realloc

Description

Using realloc() to change memory allocation.

Demo Code

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

int main( void )
{
    char buf[80], *message;

    puts("Enter a line of text.");
    gets_s(buf);//from   www  . ja  v  a  2 s.c om

    /* Allocate the initial block and copy the string to it. */

    message = (char *)realloc(NULL, strlen(buf)+1);
    strcpy(message, buf);

    puts(message);

    puts("Enter another line of text.");
    gets_s(buf);

    /* Increase the allocation, then concatenate the string to it. */

    message = (char *)realloc(message,(strlen(message) + strlen(buf)+1));
    strcat(message, buf);

    puts(message);
    return 0;
}

Result


Related Tutorials