Thread: Sorting a string, case insensitive

I need to take in a string up to 25 characters and output them in alphabetical order (case insensitive) according to the ASCII table. I have got them sorted, but I don't know how to make the case not matter.

examples
#?34trp ===> #34?prt
I am good ===> _ _adgImoo
aBA bCB ===> _aABbBC

For example, my code would only output the last example ===> _ABCabc. I know I could change them all to capitals and then sort, but I don't know a way to change them back into lower case if there is more than one of them.

Heres the code I have written:

Code:

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

int main()
{
    char s1[25];
    char temp;
    int i, j;
    gets(s1);
    printf(" \n %s \n", s1);





    for(j=0; s1[j]!= '\0'; j++)
    {
       for(i=0;s1[i+1]!= '\0'; i++)
       {
          if (s1[i]>s1[i+1])
          {
            temp=s1[i];
            s1[i]=s1[i+1];
            s1[i+1]=temp;

      }
  }
    
      j++;

}

  printf(" \n %s \n", s1);

    return (0);
}

Thanks for the time,
Paul