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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main(void)
  5. {
  6.     int inputAsingleChar, i=0, j=4;
  7.  
  8.     /* initial allocation */
  9.     char *name = malloc(j);
  10.     if (name == NULL) {
  11.         /* Handle malloc failure */
  12.     }
  13.  
  14.     printf("Your name: \n");
  15.     while((inputAsingleChar = getchar()) != '\n' && inputAsingleChar != EOF)
  16.     {
  17.         /* reallocate as needed */
  18.         if (i == j) {
  19.             j *= 2;
  20.             char *tmp = realloc(name, j);
  21.             if(tmp == NULL){
  22.                 /* Handle realloc failure */
  23.             } else {
  24.                 /* no need to realloc() again, and no need to free tmp */
  25.                 name = tmp;
  26.             }
  27.         }
  28.         /* store current character */
  29.         name[i++] = inputAsingleChar ;
  30.     }
  31.  
  32.     /* add null terminator */
  33.     name[i] = '\0';
  34.  
  35.     printf("Name: %s  \n", name);
  36.     free(name);
  37.  
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0s 10320KB
comments (?)
stdin 
This is a test which is long enough to require a few reallocations.
stdout 
Your name: 
Name: This is a test which is long enough to require a few reallocations.
https://ideone.com/khKncC
dynamic allocation
language:
C (gcc 8.3)
created:
8 years ago
visibility:
secret

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