[Solved] Error: Segmentation Fault 11 in Palindrome

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I couldn’t understand some of your code it seemed you were doing some unnecessary things. What was msg for? This should work if I understood your problem correctly:

#include <stdio.h>
#include <string.h>

void palindrome_check(int ch_length, char text []);

int main(void)
{
    char text [100];
    /*
    int length;
    printf("Enter how many characters are in the message: ");
    scanf("%d", &length);
    Not necessary if you use strlen()*/

    printf("Enter the message: ");
    fgets(text,100,stdin); /*Using fgets() to allow spaces input*/
    /*Strip the newline*/
    text [strlen(text)-1]='\0';

    palindrome_check(strlen(text),text);

    return 0;
}

void palindrome_check(int ch_length, char text [])
{
    int i;
    for (i = 0; i < ch_length; i++)
    {
      if(text [i] != text [ch_length-i-1])
      {
        printf("It's not a palindrome.\n");
        return;
      }
    }
    printf("It is a palindrome!\n");
}

solved Error: Segmentation Fault 11 in Palindrome