Sort alphabetic into lower n in ascending order

[changwl8888]

Sort line
-----------------
Enter a string (1-40 characters): CBA123fde[]aa
Output: aaabcdef


Above is the output i need..but i have done some code...and i dun have idea how to make it...could anyone help show me some easy example...

below is my code...i dont think is correct..please correct me

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

#define LSIZE 50

int main(void)
{
int i;
char value;
char textInput[50];
int len;

printf("Sort Line\n");
printf("--------------------------------\n");
printf("Enter a string:");


scanf("%s",textInput);

len=strlen(textInput);

for (i=0; i <len; i++) {
value = textInput[i];

if (isalpha(value)){
textInput[i]=value;
}
else if(isdigit(value))
{
textInput-textInput[i];
}else
{
textInput-textInput[i];
}







}
printf("%s\n", textInput);


}



/* loop back until EOF */


Help!!! Urgent

[jkmyoung]

When you do textInput-textInput[i]; do you mean to put in
textInput[i] = ' '
or something like that?
You might want to use a 2nd array to store your output.