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  1. #include <stdio.h>
  2.  
  3. #define SIZE 100
  4.  
  5. int myStringLengthArray(const char string[])
  6. {
  7.     int length = 0;
  8.  
  9.     while (string[length] != '\0')
  10.     {
  11.         ++length;
  12.     }
  13.  
  14.     return length;
  15. }
  16.  
  17. int myStringLengthPointer(const char *string)
  18. {
  19.     const char *start = string;
  20.  
  21.     while (*string != '\0')
  22.     {
  23.         ++string;
  24.     }
  25.  
  26.     return (int)(string - start);
  27. }
  28.  
  29. int main(void)
  30. {
  31.     char string[SIZE];
  32.  
  33.     printf("Enter a string: ");
  34.     fgets(string, SIZE, stdin);
  35.  
  36.     printf("\nLength using array notation = %d\n",
  37.            myStringLengthArray(string));
  38.  
  39.     printf("Length using pointer notation = %d\n",
  40.            myStringLengthPointer(string));
  41.  
  42.     return 0;
  43. }
Success #stdin #stdout 0s 5348KB
comments (?)
stdin
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Standard input is empty
stdout
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Enter a string: 
Length using array notation = 0
Length using pointer notation = 0
https://ideone.com/j0IsPu
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

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