sort.c

/*
 *
 * Copyright Ahmad Hasan Mubashshir <ahmubashshir@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 */

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

//  Functon for swapping values
//		@param char* a, b
//		@return none
void swap(char* a, char* b)
{
	*a^=*b;
	*b^=*a;
	*a^=*b;
}

//	Main sorting function.
//		@param	char* str, str_len
//		@return none
void sort(char* str, unsigned len)
{
	for(int i = 0; i<len; i++)
	{
		for(int j = i; j<len; j++)
		{
			if( isdigit(str[i]) && isdigit(str[j]) && str[i]>str[j]) swap( &str[i], &str[j]);
			else if ( !(isdigit(str[i]) || isdigit(str[j])) && str[i]>str[j]) swap( &str[i], &str[j]);
		}
	}

}


int main()
{
	freopen("sort.in", "r", stdin);
	freopen("sort.out", "w", stdout);
	unsigned in; char str[79];
	scanf("%u",&in);
	while(in--)
	{
		scanf("%s", str);
		sort(str, strlen(str));
		printf("%s\n",str);
	}
}

sort.in

2
a2c1b
ai5d2k3x325x

sort.out

a1b2c
ad2i2k3x355x