fork download
copy 
  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. #define SIZE 100
  5.  
  6. void copyUsingArray(char destination[],
  7.                     const char source[])
  8. {
  9.     int i = 0;
  10.  
  11.     while ((destination[i] = source[i]) != '\0')
  12.     {
  13.         ++i;
  14.     }
  15. }
  16.  
  17. void copyUsingPointer(char *destination,
  18.                       const char *source)
  19. {
  20.     while ((*destination = *source) != '\0')
  21.     {
  22.         ++destination;
  23.         ++source;
  24.     }
  25. }
  26.  
  27. void concatenateUsingArray(char destination[],
  28.                            const char source[])
  29. {
  30.     int i = 0;
  31.     int j = 0;
  32.  
  33.     while (destination[i] != '\0')
  34.     {
  35.         ++i;
  36.     }
  37.  
  38.     while ((destination[i] = source[j]) != '\0')
  39.     {
  40.         ++i;
  41.         ++j;
  42.     }
  43. }
  44.  
  45. void concatenateUsingPointer(char *destination,
  46.                              const char *source)
  47. {
  48.     while (*destination != '\0')
  49.     {
  50.         ++destination;
  51.     }
  52.  
  53.     while ((*destination = *source) != '\0')
  54.     {
  55.         ++destination;
  56.         ++source;
  57.     }
  58. }
  59.  
  60. int main(void)
  61. {
  62.     char source[] = "Hello World";
  63.     char destination1[SIZE] = "";
  64.     char destination2[SIZE] = "";
  65.  
  66.     copyUsingArray(destination1, source);
  67.     copyUsingPointer(destination2, source);
  68.  
  69.     printf("Copy using array notation: %s\n",
  70.            destination1);
  71.  
  72.     printf("Copy using pointer notation: %s\n",
  73.            destination2);
  74.  
  75.     char first1[SIZE] = "Good ";
  76.     char first2[SIZE] = "Good ";
  77.     char second[] = "Morning";
  78.  
  79.     concatenateUsingArray(first1, second);
  80.     concatenateUsingPointer(first2, second);
  81.  
  82.     printf("Concatenate using array notation: %s\n",
  83.            first1);
  84.  
  85.     printf("Concatenate using pointer notation: %s\n",
  86.            first2);
  87.  
  88.     return 0;
  89. }
Success #stdin #stdout 0s 5340KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Copy using array notation: Hello World
Copy using pointer notation: Hello World
Concatenate using array notation: Good Morning
Concatenate using pointer notation: Good Morning
https://ideone.com/Pobhqm
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!