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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.     char array[10][100] = {"apple", "banana", "strawberry", "grapefruit"};
  5.     size_t arrayLength = 0;
  6.  
  7.     arrayLength = 0;
  8.     for (size_t i=0; i<10; i++) {
  9.         if (array[i]) {
  10.             arrayLength++;
  11.         }
  12.     }
  13.     printf("arrayLength when checking for NULL: %zu\n", arrayLength);
  14.  
  15.     arrayLength = 0;
  16.     for (size_t i=0; i<10; i++) {
  17.         if (array[i][0]) {
  18.             arrayLength++;
  19.         }
  20.     }
  21.     printf("arrayLength when checking for empty string: %zu\n", arrayLength);
  22.  
  23. 	return 0;
  24. }
  25.  
Success #stdin #stdout 0s 5536KB
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stdin
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Standard input is empty
stdout
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arrayLength when checking for NULL: 10
arrayLength when checking for empty string: 4
https://ideone.com/8Yf72w
arrayLength with UB
language:
C (gcc 8.3)
created:
3 years ago
visibility:
secret

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