Difference between two strings

[Aman 1]

I am currently working on a project to develop a library in C. I finally found a mistake that I did not expect and it's hard to explain.

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

int main () 
( 
char * string1 = "text", string2 [] = "text"; 
printf ( "% d", sizeof (string1)); 
printf ( "% d", sizeof (string2)); 

return 0; 
)

I thought we would get the same result but not: string2 is greater than string1. Is there any difference between these 2 syntax ... Thank you for your help

[Zecho]

string1 is a pointer: sizeof gives the size of the pointer. string2 is an array: sizeof gives the size of the table, because in string2 [] = "text" it is created automatically.

In the first case, you're pointing a pointer to a string literal. In the second case, you initialize an array with the string.

[Walby]

Check this example :

 import org.apache.commons.lang.StringUtils;

public class String1 {

  public static void main(String args[]) {

    System.err.println(StringUtils.getLevenshteinDistance("gov", "govern"));
  }
}

[Aberto]

A string is a sequence of characters. Any sequence or set of characters defined within double quotation symbols is a constant string, Basically, you would cycle through each character in one string, and compare it to the corresponding character in the other. If the string or the character doesn't exist, then there is a difference.