Function to reverse string in C

Question

I wrote this function to reverse a string in C, but when switching characters in the string the program crashes. I have no idea what\'s causing it, so any help would be apprecia

Answer 1

"Example" is a string literal, which usually means you cannot change it.

Please try this:

char str[] = "Example";
reverse(str);

Answer 2

You need to take character pointer as a parameter in your function:

Void reverse (char *ptr)
{
    // ...
}

And perform operation on pointer.

Answer 3

This should work:

#include<string.h>

int main()
{
  char str[100], temp = 0;
  int i = 0, j = 0;

  printf("nEnter the string :");
  gets(str);

  i = 0;
  j = strlen(str)-1;

  while(i<j)
  {
    temp=str[i];
    str[i]=str[j];
    str[j]=temp;
    i++;
    j--;
  }

  printf("nReverse string is :%s",str);

  return(0);
}

Answer 4

read this for more information What is the difference between char s[] and char *s?

Another link https://stackoverflow.com/questions/22057622/whats-the-difference-structurally-between-char-and-char-string#22057685

this should fix it.

main()
{    
char array[] = "Example";
reverse(array); 
}

when you do reverse("Example") this is the same as

char *string = "Example";
reverse(string) //wont work

The links should clarify your doubts from here.